Norm

ASTM E848-94(2012)

Standard Guide for Safety and Health Requirements Relating to Occupational Exposure to Water-Insoluble Chromates

61,51

Over deze norm

Status Definitief
Aantal pagina's 12
Commissie D01.21
Gepubliceerd op 01-06-2012
Taal Engels

1.1 This guide covers control procedures for the safe production, storage, transportation, and handling of only the hexavalent chromium compounds found in Table 1 and their various hydrates, and mixtures of coprecipitates of the same regardless of crystalline form.

TABLE 1 Examples of Some Hexavalent Chromium Compounds

Chemical Name

Formula

Color Index NameA

Barium chromate

BaCrO4

Pigment Yellow 31

Barium potassium chromate

BaK3(CrO4)2

Pigment Yellow 31

Basic copper chromate

CuCrO4
xCu(OH) 2

Not listed

Basic cadmium chromate

Cd2(OH)2CrO4

Pigment Yellow 44

Basic lead chromate

PbCrO4PbO

Pigment Orange 21

Bismuth basic dichromate

Bi2O3CrO3

Pigment Red 103

Calcium chromate

CaCrO4

None assigned

???Chromic chromate???
(calcium chromate sinter)

xCaO yCr2O 3
zCrO 3

Pigment Yellow 33
Not listed

Ferric chromate

Fe2(CrO4)3

Pigment Yellow 45

Basic ferric chromate

Fe(OH)CrO4

Pigment Yellow 45

Lead chromate

PbCrO4

Pigment Yellow 34

Lead molybdochromate

PbCrO4PbMoO4

Pigment Red 104

Potassium zinc chromate

K2O 4ano??4Cr4O3

Pigment Yellow 36

Strontium chromate

SrCrO4

Pigment Yellow 32

Zinc chromate

ZnCrO4

Pigment Yellow 36

A For Classification, not Toxicology.

1.2 This guide is not intended to cover ( a) such ???soluble??? chromates as chromates of sodium, potassium, magnesium, or ammonium; (b) soluble bichromates; (c) chromic acid; (d) volatile chromyl compounds; (e) any trivalent chromium compound; or (f) elemental chromium. Omission of said compounds or classes of compounds should not be construed to mean that they may be handled without due regard to their particular physical, chemical, and toxicological hazards (9, 10, 11).

1.3 The chromate ion, CrO4???2 , depending upon the acidity, complexes to form di-, tri-, and higher polychromates; hence, the chromates listed in Table 1 may contain mixtures of polychromates, depending on the method of isolation and end use.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. (For more specific precautionary information see Section 5.)

Details

ICS-code 13.100
Nederlandse titel Standard Guide for Safety and Health Requirements Relating to Occupational Exposure to Water-Insoluble Chromates
Engelse titel Standard Guide for Safety and Health Requirements Relating to Occupational Exposure to Water-Insoluble Chromates

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