HYDROXYETHYLIDENE-1,1 DIPHOSPHONIC ACID ACID (CAS NO 2809-21-4) , ALSO KNOWN AS ETIDRONIC ACID IN WATER. IT IS PRODUCED BY REACTION AND HYDROLYSIS OF PHOSPHORUS TRICHLORIDE IN AQUEOUS ACETIC ACID AT ELEVATED TEMPERATURE. PRODUCT IS SPECIFICALLY DESIGNED AND IDEALLY SUITED FOR PERSONAL CARE AND COSMETIC APPLICATIONS.

CLASSIFICATION HAS BEEN DETERMINED IN ACCORDANCE WITH THE FOLLOWING:- GENERAL INTERPRETATIVE RULES (GIR)S GIR 1 HAS BEEN USED TO CLASSIFY THIS PRODUCT BY THE TERMS OF HEADING 2931 - OTHER ORGANO-INORGANIC COMPOUNDS GIR 6 HAS BEEN USED TO CLASSIFY THE GOODS TO SUBHEADING LEVEL 293139 - OTHER CN CODE 29313950 FOR Etidronic acid (INN) (1-hydroxyethane-1,1-diphosphonic acid) and its salts ALSO CLASSIFIED IN ACCORDANCE WITH: CHAPTER 29, GENERAL CHAPTER NOTES 1 (A) AND 1(D) HSEN NOTE (8) TO HEADING 2931