Triphenyl Phosphite (TPPi) Description: Appearance:Colorless to yellowish transparent Purity, % Min 99 Color, APHA 50 Specific gravity, @25 : 1.180-1.186 Refraction, · @20: 1.585-1.592 Free Phenol, % max1 Acidity (as NaOH), mg/g max 0.5 CAS NO.: 101-02-0 HS CODE: 292029 Country of origin: China Annual output: 1500 tons