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है”ह”ह

IS 14932 (2001): Sulfamic Acid [CHD 1: Inorganic Chemicals]

-. .

May 2001

//

IS 14932:2001

Indian Standard

SULFAMIC ACID — SPECIFICATION

ICS 71.060.30

,.

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

Price Group 4

General Inorganic Chemicals Sectional Committee, CHD 3

FOREWORD

This Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by thecTen~I_d Inorganic Chemicals Sectional Committee had been approved by the Chemical DivisionCouncil.

Sulfamic acid is chemically H,NS020H having a molecular mass of 97.1. It is a strong monobasic acid,comparable in strength to hydrochloric acid and nitric acid. Sulfamic acid being a stable, non-hydroscopic,odourless, colorless and free tlowing crystalline. powder, is used conveniently for various industrial applica-tions.

Sulfamic acid finds uses in dyes, pulp and paper industries. It also finds uses as chlorine stabilizer inswimming pools. It readily forms salts with the oxides, hydroxides and carbonates of active metals. Most metatsulfamates are water-soluble which make them useful as electroplating salts. This standard, however, does notcover the material intended for use in electroplating industry for which a separate Indian Standard, namely,IS 9341 : 1979 ‘Sulfamic acid for electroplating exist’. Deposits from the sulfamates of cadmium, cobalt,copper, indiurn,lead, nickel, rhodium and silver, for example, are bright and dense. Lead sulfamate is usedin retlning lead when a high quality is desired. Aluminum sulthrnate baths are preferred for anodic oxida-tion of aluminum and aluminium alloys as they give an abrasion and corrosion resistant finishes withgood dye receptivity.

An important application of sulfamic acid is its use as a descaling agent in the cleaning of a variety ofindustrial equipments such as boilers, heat exchangers, evaporators, condensers, cooling towers, coilsand a wide range of heating and cooling systems. For this purpose sulfamic acid is marketed in the formof suitably formulated ‘Sulfamic Descalants’ in various grades.

In the intervening period of more than a decade sulfamic acid, which was hitherto an imported item, hasbeen commercially manufactured in quantities of more than 5000 tonnes per annum, in India. This hasnecessitated the need to formulate an Indian Standard covering all grades of sulfarnic acid keeping inview its uses and application in industries other than electroplating alone.

IS 9341 : 1979 exists for sulfarnic acid for electroplating only. With the publication of this standard,which has got broader scope, and field of application. IS 9341 : 1979 may be withdrawn at a later date.

The composition of the committee responsible for formulation of this standard is given in Annex H.

There is no 1S0 specification for this product. This standard is based on the data available for indigenousproduct.

3

1.1...- ‘,

For the purpose of deciding whether a particular requirement of this standard is complied with, the final value,observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance withIS 2: 1960 ‘Rules for rounding off numerical values (revised)’. The number of significant places retainedin the rounded off value should be the same as that of the specified value in this standard.

IS 14932 : 2001

Indian Standard

SULFAMIC ACID — SPECIFICATION

1 SCOPE

This standard prescribes the requirements andmethods of sampling and test for sulfamic acid.

2 REFERENCES

The Indian Standards listed below contain provi-sions, which through reference in this text consti-tute provisions of this Indian Standard. At the timeof publication, the editions indicated were validiAll standards are subject to revision and parties toagreements based on this standard are encouragedto investigate the possibility of applying the mostrecent editions of the standards indicated below:

1S No. Title

265:1993 Hydrochloric acid ~ourth revision)

1070: 1992 Reagent grade water (third revision)

4905: 1968 Methods for random sampling

3 GRADES

The material shall be of the following two grades:

a) Technical Grade — For dyes, paper and pulpindustries and descalants.

b) Pure Grade —For electroplating.

4 REQUIREMENTS

4.1 Description

The material shall be in the form of colorless or whitecrystals fret_ from dim foreign matter and visibleimpurities. The material shall be readily soluble inwater, but sparingly soluble in alcohol and shallcorrespond essentially to the formula ~NS020H.

4.2 The material shall also comply with therequirements prescribed in Table 1, when tested inaccordance with the methods given in Annex A toAnnex F. Reference to the relevant Annexes is givenin CO15 of the Table 1.

5 SAFETY PRECAUTIONS IN HANDLING

SULFAMIC ACID

Although brief contact of dry crystalline sulfamic acidwith skin does not cau.m noticeable effect, precau-tions should be taken to avoid contact with eyes, skinor clotilng. Goggles and gloves should be worm whenhandling sulfamic acid, dry or in solution. In the eventof contact, flush skin with water, flush eyes withplenty of water and get medical aid.

Table 1 Requirements for SulfamicAcid

(Clause 4.2)

S1 No.

(1)

i)

ii)

iii)

iv)

v)

vi)

Characteristic

(2)

Matter insoluble in water,percent by mass, Mux

Sulphates (as S04),percent by mass, Max

Lead (as Pb),percent by msss, Max

Sulfamic acid(as NE$S020H)percent by mass, Min

Iron (m Fe),percent by maw, Mux

Free moisture,

percent by mass, Max

Requirement

‘TechnicatI

Pure’Oracle Grade

(3) (4)

0.05 0.01

0.1 0.05

0.001 0.0005

99.5 99.5

0.001 0.0005

0.2 0.2

Method of TestRef to Annex

(5)

A

B

c

D

E

F

“.“

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i

:

1

IS 14932 : 2001.

6 PACKING AND MARKING

6.1 Packing

The material shall be packed in high densitypolyethylene woven bags provided with polyethylenelining.

6.2 Marking

The bags shall be legibly marked with the followinginformation:

a) Name and grade of the materiti,b) Net mass of the ma@,c) Indication of the source of manufacture;

d) Month and year of martufacturez and

e) Batch number, to enable the batch of manu-facture to be traced from records.

6.2.1 BIS Certification Marking

The material may also be marked with the StandardMark.

6.2.1.1 The use of the Standard Mark is governedby the provisions of the Bureau of ZndianStandardsAct, 1986 and the Rules and Regulationsmade thereunder. The details of conditions underwhich the licence for the use of Standard Markmay be granted to manufacturers or producers maybe obtained from the Bureau of Indian Standards.

7 SAMPLING

The method of drawing representative samples of thematerial, the number of tests and the criteria forconformity shall be as prescribed in Annex G.

8 QUALITY OF REAGENTS

Unless specified otherwise, pure chemicals andreagent grade water (see IS 1070) shall be employedin tests.

NOTE —’Pure chemicals’ shall mean chemicals that do

not contain impurities, which affect the results of anafysis.

ANNEX A

. [Clause 4.2 and Table 1, S1No. (i)]

DETERMINATION OF MA’ITER INSOLUBLE IN WATER

A-1 PROCEDURE A-2 CALCULATION

Weigh accurately 30.0 g of the material, previously Matter insoluble in water, percent by massdried for two hours in an electrically heated oven Mlat 105 ~ 2°C. Dissolve in 150 ml of water and heat =—

on a steam bath for 30 minutes. Filter through a M

tared sintered glass crucible (G No. 4). Wash the where

residue with hot water dry at 105 & 2%2 and weigh Ml = massing of the residue, and

to constant mass. M = massing of the material taken for test.

ANNEX B

[Clause 4.2 and Table 1, S1No. (ii)]

DETERMINATION OF SULPHATES

B-1 GENERAL IS 265.

Turbidity produced by the addition of barium B-3.2 Barium Chloride Solution — 10 percentchloride solution to the solution containing the (ndv)’. Dissolve 10 g of barium chloridematerial is compared with that produced in the (BaC12.2FJO) in 100 ml water.blank containing standard sulphate solution.

B-3.3 Standard Sulphate Solution — Weigh accu-B-2 APPARATUS rately 0.1815 g of potassium sulphate (K,SOJ and

B-2.1 Nessler Cylinders — Two of 50-ml capacity. dissolve in water in a 100 ml volumekic flask.Make up the volume with water and mix. One

B-3 REAGENTS

B-3.1 Concentrated

millilitre of this solution is equivalent to 1.0 mg ofHydrochloric Acid — See sulphate (as SOJ.

!

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.,

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2

B-4 PROCEDURE

Weigh accurately 2.00 g of the material for puregrade and 1.00 g for technical grade. Transfer to a50 ml Nessler cylinder, dissolve it in little water andadd 2.5 ml of concentrated hydrochloric acidfollowed by5mlof barium chloride solution. Makeup the volume with water and mix. Carry out acontrol test in another Nessler cylinder using 1 mlof standard sulphate solution and the same quanti-

1S 14932 : 2001

ties of other reagents in the same total volume aswith the material and compare the turbidityproduced in the two cylinders against a blackbackground.

B-4.1 The material shall be taken as havingnot exceeded the limit prescribed for sulphatesin Table 1 if turbidity produced with the materialis not greater than that produced in the controltest.

ANNEX C

[Clause 4.2 and Table 1, S1 No. (iii)]

DETERMINATION OF LEAD (as Pb)

C-1 APPARATUS

C-1.l Nessler Cylinders — Two of 50-ml capacity.

C-2 REAGENTS

C-2.1 Standard Lead Solution — Dissolve 1.60 gof lead nitrate in water. Add 1 ml of concentratednitric acid and make up the volume to exactly 1000ml. llansfer exactly 10 ml of the solution to avolumetric flask and dilute it again with water to1000 ml mark. One millilitre of the diluted solu-tion contains 0.01 mg of lead (as Pb). The dilutesolution shall be freshly prepared.

C-22 Ammonia SoIution A.R. — 25 percent

(tivj approximately.

C-2.3 Sodium Sulphide Solution — 10 percent(m/v).

C-2.4 Potassium Cyanide Solution — 10 percent(m/v).

CAUTION: HIGHLY POISONOUS. HANDLEWITH CARE. USE PERSONAL PROTECTIVE

EQUIPMENT WHILE HANDLING AND USE.

C-3 PROCEDURE

Weigh accurately 5 g of material for technical grade(10 g for pure grade). Add 10 ml water and 6 mlstrong A.R. ammonia solution slowly whilecooling (12 ml for pure grade). Make sure that thesolution is alkaline to pH paper. Add 5 ml of 10percent potassium cyanide solution. Transfer thesolution to a Nessler cylinder. Make volume to 50ml with distilled water. Add 0.5 ml sodium sulphidesolution. Shake well. Similarly in the secondNessler cylinder carryout a control test using 5.0ml standard lead solution and 2 ml strong A.R.ammonia solution keeping the same qualities ofother reagents. Compare the colour produced in thetwo cylinders.

C-3.1 The limit prescribed in Table 1 shall be takenas not having been exceeded if the intensity ofcolour produced with the material is not greater thanthat produced in the control test.

ANNEX D

[Ckune 4.2 and Table 1, S1No. (iv)]

DETERMINATION OF SULFAMIC ACID

D-1 GENERAL transfer it quantitatively to a conical flask with the

Sultlunic acid content is determined volumetric~lyby titration with sodium nitrate using starch iodidepaper as external indicator.

D-2 REAGENTS

D-2.1 Dilute Sulphuric Acid — 1:l(v/v).

D-2.2 $Wmdard Sodium Nitrite Solution — 0.5 N.

D-2.3 External Indicator — Starch iodide ~aper.

D-3 PROCEDURE

Weigh accurately about 1.0 g of the material and

help of water. Dilute the contents to approximately150 ml with distilled water. Add 5 ml of 1:1sulphuric acid and titrate against 0.5 N previouslystandardized (with A.R. grade sulfamic acid)sodium nitrite solution. Sodium nitrite solutionshould be added slowly and with constant stirring/shaking. The temperature of the contents shouldpreferably be below 20°C to avoid decompositionof nitrous acid. The end point of titration is shownby a distinct blue coloration on starch-iodidepaper, When it is brought into contact with 1 dropof the titre solution.

3

.—-!2

IS 14932 : 2001

D-4 CALCULATION

Sulfamic acid content, percent by mass

9.7 NV=M

where

N = Normality of sodium nitrate solution,

V = Volume ofsodium nitrite solution usedin titration, and

M = Mass in g of the material taken for thetest.

ANNEX E

[Clause 4.2 and Table 1, S1No. (v)]

DETERMINATION OF IRON

E-1 OUTLLNE OF THE METHOD

Preliminary reduction of iron by means ofhydroxylamine hydrochloride (NI-$OH.HC1). For-mation of the complex iron with 1,10-phenanthroline in a buffer medium of pH 3.5 to 4.2and photometric measurement of colour intensityat 510 nm wavelengths.

E-2 REAGENTS

. E-2.1 Hydroxylamine hydrochloride (NHZOH,HCI) Solution — 1 percent (tiv).

E-2.2 1,10 Phenanthroline MonohydrateSolution — 0.15 percent

Add 0.15 g of 1,10-phenanthroline monohydrate inlittle water and warm the solution to dissolve the salt.Cool and dilute to 100 ml.

E-2.3 Acetate Buffer Solution — Dissolve 136 gof sodium acetate trihydrate in about 250 ml ofwater. Add 120 ml of glacial acetic acid and diluteto 500 ml.

E-2.4 Mixed Reagent Solution — Prepare themixed reagent solution mixing the above threesolutions (E-2.1 to E-2.3) in 1:1:3 proportion. Thismixed reagent is quite stable.

E-2.5 Standard Iron Solution — Weigh accurately0.7022 g of A.R. grade ferrous ammonium sulphate[Fe(NH,)2(S0,)2. 6H,0] and transfer to a beakercontaining 100 ml of water. Add 5 ml of 20 percentA.R. grade sulphuric acid and dissolve the crystals.Transfer to a 1 000 ml volumetric flask, dilute tothe mark and mix 1 ml of this solution contains 0.1mg Fe.

E-2.6 Sodium Hydroxide A.R. Grade

E-2.7 Dilute Sulphuric Acid Solution — 25

percent approximately using A.R grade sulphuricacid.

E-3 APPARATUS

E-3.1 pH Meter with Glass Electrode

I..‘. . . . . . . ,.

.;

.4

E-3.2 Photoelectric Absorptiometer

E-4 PROCEDURE

E-4.1 Weigh accurately 20 g of the material. Addapproximately 70 ml of water and 1 ml dilutesulphuric acid. Heat to around 60°C to dissolvethe sample. Transfer to a 100 ml volumetric flask.Cool and dilute to the mark with water. Shake well.Filter, if necessary, and transfer 50 ml aliquot to a150-ml beaker. Add 25 ml of o-phenanthrolinemixed reagent and 4 g A.R. grade sodium hydro-xide. Cool the solution and finally adjust the pH to4 with either dilute sulphuric acid or sodiumhydroxide. Transfer to a 100 ml volumetric flaskand dilute to the mark with water.

Prepare a blank by taking 4.0 g A.R. sodiumhydroxide and dissolve in 25 ml water. Cool it andadd 25 ml o-phenanthroline mixed reagent. Adjustthe pH to 4 by addition of dilute sulphuric acidsolution. Transfer to a 100 ml volumetric flask anddilute to the mark with distilled water. Shake welland allow to stand for 30 min.

Transfer the solution to the cell of photoelectricabsorptiometer and measure the absorbency at a wave-length of510 nm, after adjusting the instrument tozero absorbency against blank.

E-4.2 Preparation of Calibration Graph

TransferO.5, 1.0,1 .5,2.0,2.5 and 3 ml of standard ironsolution into six 100-ml volumetric flask. Add 25ml o-phenanthroline mixed reagent and if neces-sary adjust the pH to about 4 with the addition ofdilute A.R. grade sulphuric acid or sodium hydrox-ide, and dilute to the mark with water. Prepare onereagent blank as above but without any addition ofstandard iron solution. Allow standing for 30 minand measuring the absorbency of the solution byproceeding exactly as mentioned in E-4.1 on thephotoelectric absorptiometer. Plot a graph havingthe quantities in milligrams of iron (Fe), in thestandard solution as abscissa and the correspond-ing absorbance values as the ordinates.

4

IS 14932 : 2001

#,-.y

.

E-5 CALCULATION Iron (as Fe), parts permillion=Mlx 100

I)etermine the quantities of iron (as Fe) correspond- where

ing to the absorbance reading of tie test sample M, = Mass in milligram of iron (as Fe) insolution by means of the graph. the aliquot test solution obtained from

the graph.

ANNEX F

[Clause 4.2 and Table 1, S1 No. (vi)]

DETERMINATION OF FREE MOISTURE

F-1 PROCEDURE

Weigh accurately about 10 g of the material in aflat-bottomed petri dish. Place the dish in anelectric oven maintained at 100-105°C for at least4 hours. Cool in a desiccator and weigh. Repeatthe operation till a constant mass is obtained.

where

M, = Mass in g of the material taken for test,and

h42= Mass in g of the material obtainedafter drying.

F-2 CALCULATION

Free moisture content,(M, - M*) x 100

percent by mass =M,

ANNEX G

(Clause 7.1)

SAMPLING OF SULPHAMIC ACID

G-1 GENERAL REQUIREMENT FORSAMPLING

G-1.l In drawing, preparing, storing and handlingtest samples, the following precautions shall beobserved.

G-1.2 The samples shall be placed in suitable, clean,dry and air-tight containers.

G-1.3 While handling the test samples, precautionsshall be taken tb avoid contact with eyes, skin orclothing and goggles and gloves shall be worn.

G-1.4 The samples matqrial shall be kept in a pro-tected place and shall not be exposed to damp air.

G-1.5 Each sample container shall be sealed air-tight and marked with full details of sampling, suchas the date of sampling, the year of manufacture,the lot number and name of the manufacturer.

G-2 SCALE OF SAMPLING

G-2.1 All the bags in a single consignment of thematerial drawn from a single batch of manufactureshall constitute a lot.

G-2.2 For ascertaining conformity of the material

in the lot to the requirements of the specification,samples shall be tested from each lot separately.

G-2.3 The number of bags to be chosen from thelot shall depend upon the size of the lot and shallbe according to Table 2.

G-2.3.1 The bags to be selected for this purposeshall be chosen at random from the lot. In order toensure randomness of selection, reference may bemade to IS 4905. In case this standard is not read-ily available , the following procedure may beadopted:

Starting from any bag in the lot count them in oneorder as 1, 2, 3, etc, up to r and so on where r is theintegral part of N/n. Every rth bag thus counted shallbe withdrawn till the requisite number of bags isobtained.

G-3 TEST SAMPLES AND REFEREE SAMPLE

G-3.1 From each of the bags selected accordingto G-2.3 draw small quantity of material fromdifferent parts of the bag with the help of a suitablesampling implement. The quantity of the materialdrawn from each bag shall be thoroughly mixed andshall be sufficient to make triplicate determinationsfor all requirements given in Table 1.

5

IS 14932 : 2001.

G-3.2 Out of the portions of the material from allthe bags selected according to G-2.3, approximatelyequal quantity of the material shall be taken andmixed together so as to form a composite sampleof quantity sufficient to carry out triplicatedeterminations for all the characteristics to be testedon the composite sample.

G-3.2.1 The composite sample shall be divided intothree equal parts, one for the purchaser, and anotherfor the supplier and the third to be used as a refereesample.

G-3.3 The remaining parts of the material from eachselected bag shall be divided into three equal parts,each forming an individual sample. One set ofindividual samples representing each selected bagshall be marked for the purchaser, another for thesupplier and the t.hkd to be used as a referee sample.

G-3.4 All the individual and the composite samplesshall be immediately transferred to separate samplecontainers and labelled with full identificationparticulars.

G-3.5 The referee sample consisting of a compositeand a set of individual samples shall bear the sealsof both the purchaser and the supplier. These shallbe kept at a place agreed to between thepurchaser and the supplier, to be used in case of adispute between the two.

G-4 NUMBER OF TESTS

G-4.1 Test for determining sulphamic acid contentshall be conducted on each of the individualsamples.

G-4.2 Tests for the remaining requirements,prescribed in Table 1, shall be conducted on the

composite sample.

Table 2 Scale of Sampling

(Clause G-2.3)

LotSize

(M

(1)

Up to 25

26 to 50

51 to 100

101 to 300

301 and above

Number of Bags to be Selected

(n)

(2)

3

4

5

6

7

G-5 CRITERIA FOR CONFORM~Y

G-5.1 Test on Individual Samples

From the test results for sulfamic acid content, themean ~ and the range (R) of test results shall becalculated (range being defined as the differencebetween the maximum and the minimum values oftest results). The lot shall be declared to havesatisfied this requirement if the value of the expres-sion ~ -0.6 R is greater than or equal to 99.0 and99.5 for technical and pure grade material respec-tively.

G-5.2 Test on the Composite Sample

The lot shall be considered to have passed in respectof the characteristics tested on the compositesample (see G-4.2) if all the test results on thecomposite sample satisfy the correspondingrequirements given in Table 1.

G-5.3 The lot shall be declared as conforming to therequirements of this specification if G-5.1 andG-5.2 are satisfy.

\

{

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‘,

6

,._L!-

1S 14932 : 2001

ANNEX H

(F’oreword)

COMMITTEE COMPOSITION

General Inorganic Chemicals Sectional Cornrnittee, CHD 3

.

.,

Chairman Representing

Hmdustrm Lever Limited, MumbaiDR A. N. BHA?

Members

D~A. PRAMANtK(Alternate toDrA. N. Bhat)

SHRI R. M. cuR.$!3rJ1

SHRIS. P. GANDHE(Akernute)The Associated Cement Companies Limited, Mumbai

SrnuR C. SmmSHRIN. lLwI BHUSHAN(Alternate)

DRS. K. ROY

SHRIF? ICUNW (Alternate)

Bharat Electronics Limited, Bangalore

Central Glaes and Ceramics Research Institute, Kolkata

Development Commissioner, Small Scale Industries, New Delhi

Department of Industrial Policy& Romotion, Ministry ofIndustry, New Delhi

Directorate Generaf of Supplies and Disposal, New Defhi

DR J.S. REKHI

SHRIR. C. SHAW

SHRrA.K. CHMTERJI(Alternat@

SmuF?JAYAKUiVLAMN

SHRIN. K. KAUSHAL(Alternute)

Deep& Nitrite Limited,VadodaraSmu A. K. DASGDPTA

SHRIB. S. MEHTA(Alternate)

Federation of Associations of Smafl Industries of IndiajNew Defhi

Geological Survey of India, Kolfcata

SHRIK. A. ABDULKHADtR

DR K. N. MAIWR

DR SUBHASHCHANDRA(Alternate)

DRP. G. PRADHAN

SHRIP.L BWGAT (Alternute)Golden Chemicals Limited, Mumbai

SHRIR. S.VYAS

SHRIH. VAMAN Wo (Alternute)The Dharamei Morarji ChemicaJ Co Limited, Ambemath

DRP. C. GUPTASHruSuswomKuwm (Alternate)

Indian Chemicals Manufacturers’ Association, Kolkatta

REFru3ENT4Tm Indian Oil Corporation “Limited. (Refineries and PipelinesDivision), New Defhi

Indian Bureau of Mines, NagpurSHRIG. M. RAO

SHRIS. R. BHAISARE!(Alternate)

SHUA. K. DAS

SHRIR. BHA’ITACHARJEE(Alternute)Boc India Limited, Kolkata

SHSIR. P.KHANNA

DRA. K. SARANGI(Alternate)Mhristry of Defence (DGQA), Pune

Ministry of Defence (R & D), DelhiDrtS. K. KAPOOR

DRR. K. Wnu

SHRIR. S. H. IQBAL

DR C. GOPTNATHAN(Alternate)Nationaf Chemical Laboratory, Pune

National Test House, Kolkatta

(Continued on page 8)DRB. B. PAL

SHRIA.K. CW+KRAVARTY(Altertrute)

7

1S 14932 : 2001

(Continued from page 7)

Representing

Oil And Naturaf Gas Commission, Debra Dun

Indian Institute of Chemical Technology, Hyderabad

Projects and Development India Limited, Sindri

Sarabhai M.Chemicals, Vadodara

Members

SHRIS.C. GULATI

DR (Smuwrr) L&x&aKA~M

DRR. M. BHATNAGAR

SHRIF!R. DESAI

DRA. N. Soi-w (Alternate)

Shriram Institute For Industrial Research, DelhiSHRIP.K. KAICKER

SHRIMATILAXMIRAWAT(A&emute)

Tata Chemicafs Limited, MumbaiDRT. C. PA~

SHRIR. P. PAIHAK (Alternate)

T.C.M. Limited, MetturdaruSHRIC. R SANTTLANAKIUSHNAN

SHRIG. ETHULAJ(Alternate)

Central Salt and Marine Chemicals Research Institute,Bhavnagrrr

Union Carbide of India Limited, Mumbai

DRR. V. JASRA

DR P. M. Oz.k (Alternate)

SHKIV. B. SON1

SHRIA. K. CHAKRAVAR’N(Alternate)

Director General, BIS (Ex-oficio Member)SHRILAJINDWSINGH,

Director (Chem)

Member-Secretary&3UW4TICHITRA(hETA

Deputy Director (Chem), BIS

Auxiliary Chemicals Subcommittee, CHD 003:04

Convener

Electrolytic Manganese Company, India Limited, ThaneSHRIV.B. SONI

Membem

SHRIA.K. CHAKRAVARW(AltemutetoShri V. B. Semi)

Deepak Nitrite Limited, VadodaraSHRIB.H. PATFL

SHRIH. R. SFIAH(Alternate)

Development Commissioner, Small Scale Industries, New Delhi

Geological Survey of India, KoUrata

DRJ. S. REKHI

SHRIR. K. CHOPRA

DR (SHRHVLWI)I&-m GWA (Alternate)

Indian Council of Small Scale Industries, Kolkata

Golden Chemicals Pvt Lbnited, Mumbai

SHRIS. S. SINC+IANm

SHSIB. L. KANODIA(Akemute)

DRP. G. PRADHAN

SHRIP. I. BHAGAT(Alternate)

3 K Chemicals Company, ThaneDR H. C. SHAH

SHWVLATIK. H. SHAH(Altemati)

Projects and Development India Limited, SindriDn R. M. BHATNAGAR

SHIUB. MUKHESJEE(Alternate)

Tamil Nadu Chemical Products Limited, ChennaiSHRIS. BALASUBR&iANLAN

SHRIK. SUBRAMANtAN(Akemate)

The Travancore-Cochin Chemicals Limited, UdyogamandalSHRI D. B. RAMMOHAN

SW.IS.ANANTMARAMAN(Ahernate)

Waldies Limited, KolkataSHMS. K. BARAT

SHRJS. BANERJEE(Alternate)

.-

-. “*

Bureau of Indian Standards

BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promoteharmonious development of the activities of standardization, marking and quality certification of goodsand attending to connected matters in the country.

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BIS has the copyright of all its publications. No part of these publications may be reproduced in any formwithout the prior permission in writing of BIS. This does not preclude the free use, in the course ofimplementing the standard, of necessary details, such as symbols and sizes, type or grade designations.Enquiries relating to copyright be addressed to the Director (Publications), BIS.

Review of Indian Standards

Amendments are issued to standards as the need arises on the basis of comments. Standards are alsoreviewed periodically; a standard along with amendments is reaffirmed when such review indicates thatno changes are needed; if the review indicates that changes are needed, it is taken up for revision. Usersof Indian Standards should ascertain that they are in possession of the latest amendments or edition byreferring to the latest issue of ‘BIS Handbook’ and ‘Standards: Monthly Additions’.

This Indian Standard has been developed from Doc : No. CHD 3 (520).

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

BUREAU OF INDIAN STANDARDS

Headquarters:

Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002 Telegrams : ManaksansthaTelephones :3230131, 3233375, 3239402 (Common to all offices)

Regional Offices : Telephone

Central :

Eastern :

Northern :

Southern :

Western :

Branches :

Manak Bhavan, 9 Bahadur Shah Zafar Marg

{

3237617NEW DELHI 110002 3233841

1/14 C. I.T. Scheme VII M, V. I. P. Road, Kankurgachi

{

3378499,3378561CALCUTTA 700054 3378626,3379120

SCO 335-336, Sector 34-A, CHANDIGARH 160022

{

603843602025

C. I. T. Campus, IV Cross Road, CHENNAI 600113

{

2350216,23504422351519,2352315

Manakalaya, E9 MIDC, Marol, Andheri (East)

{

8329295,8327858MUMBAI 400093 8327891,8327892

AHMADABAD. BANGALORE. BHOPAL. BHUBANESHWAR. COIMBATORE.FARIDABAD. GHAZIABAD. GU WAHATI. HYDERABAD. JAIPUR . KANPU~.LUCKNOW. NAGPUR. PATNA. PUNE. RAJKOT. THIRUVANANTHAPURAM.

Printed at : Rabhat Offset Press, New Delhi-2

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