Commission Regulation (EU) No 231/2012

Contents

E 641 L-leucine

Synonyms	2-Aminoisobutylacetic acid; L-2-Amino-4-methylvaleric acid; alpha-Aminoisocaproic acid; (S)-2-Amino-4-methylpentanoic acid; L-Leu
Einecs	200-522-0
CAS number	61-90-5
Chemical name	L-Leucine; L-2-Amino-4-methylpentanoic acid
Chemical formula	C₆H₁₃NO₂
Molecular Weight	131,17
Assay	Content not less than 98,5 % and not more than 101,0 % on the anhydrous basis
Description	White or almost white crystalline powder or shiny flakes
Solubility	Soluble in water, acetic acid, dilute HCl and alkaline hydroxides and carbonates; slightly soluble in ethanol
Specific rotation	[α]_D²⁰ between + 14,5° and + 16,5°(4 % solution (anhydrous basis) in 6N HCl)
Loss on drying	Not more than 0,5 % (100 °C – 105 °C)
Sulphated Ash	Not more than 0,1 %
Chlorides	Not more than 200 mg/kg
Sulphates	Not more than 300 mg/kg
Ammonium	Not more than 200 mg/kg
Iron	Not more than 10 mg/kg
Arsenic	Not more than 3 mg/kg
Lead	Not more than 5 mg/kg
Mercury	Not more than 1 mg/kg