tem Index Appearance white or offwhite crystalline powder Purity 8% Specific optical rotation -9.5oï½?-11o Water content ¤0.50% Residue on ignition ¤0.50% Heavy metal (base on Pb) ¤0.002% Arsenic ¤0.0002% pH (1% aqueous solution) 3.0ï½?4.5 Solubility clear Chloride (base on Cl) ¤0.4% L-Carnitine 68.0%±1.0% 1-Tetralone 32.0%±1.0%