IS 11224 : 1985 Rock phosphate for chemical industries

1 Scope

1.1 This standard prescribes requirements and the methods ofsampling and test for rock phosphate used for manufacture ofelemental phosphorus, and phosphoric acid (see also 0.3.1).

2 Reference

IS 2 :1960 Rules for roundingoff numerical values

IS 265 :1976 Specification for hydrochloricacid

IS 1070 : 1977Specification for water for general laboratory use

IS 10116 : 1982Specification for boric acid