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Significance and Use
The procedure described is for the quality control for manufacturing liquors and specifications for the purchase of such liquors.
The chromium content of the liquors determines the amount to be used to obtain the desired degree of tannage, and hence may be a matter for specification in the purchase of leather.
1.1 This test method covers the determination of chromic oxide in chrome tanning liquors, either simple, with added aluminum or zirconium, or with the usual masking complexing agents.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D2807 Test Method for Chromic Oxide in Leather (Perchloric Acid Oxidation)
ICS Number Code 59.140.10 (Processes and auxiliary materials)
UNSPSC Code 31221601(Inorganic tanning extracts)