1-HYDROXYETHYLIDENE-1,1-DIPHOSPHONIC ACID
New specifications prepared at 63rd JECFA (2004) and published in FNP 52 Add 12 (2004). Levels of residue that are expected to remain on foods do notpose a safety concern (63rd JECFA, 2004).
SYNONYMS HEDP, ethane-1-hydroxy-1,1-diphosphonic acid, EHDP, editronic acid
DEFINITION 1-Hydroxyethylidene-1,1-diphosphonic acid (HEDP) is manufactured commercially by the reaction of phosphorous acid with one or more acetylating agents; specifically acetic anhydride, acetyl chloride and/or acetic acid. The final product is typically a 60% solution of HEDP in water.
Chemical name 1-hydroxyethylidene-1,1-diphosphonic acid
C.A.S. number 2809-21-4
Chemical formula CH3C(OH)[PO(OH)2]2
Empirical formula C2 H8 O7 P2
Formula weight 205.02
Assay Total active acid 58 – 62%
DESCRIPTION Clear pale yellow liquid, free of suspended matter
FUNCTIONAL USES Sequestrant (for use in antimicrobial washing solutions)
