CUPRIC SULFATE
Prepared at the 17th JECFA (1973), published in FNP 4 (1978) and in FNP 52
(1992). Metals and arsenic specifications revised at the 61st JECFA (2003).
An MTDI of 0.5mg/kg bw of copper was established at the 26th JECFA (1982)
SYNONYMS Copper sulfate, blue stone, INS No. 519
DEFINITION
Chemical names Cupric sulfate
C.A.S. number 7758-98-7
Chemical formula CuSO4 · 5H2O
Formula weight 249.68
Assay Not less than 98.5% and not more than 104.5%
DESCRIPTION Deep blue triclinic crystals, or blue, crystalline granules or powder; effloresces slowly in dry air
FUNCTIONAL USES Antimicrobial preservative, colour fixative
