... -13-0,Standard :USP30, Usage:Pharmaceutical grade, food grade D-Panthenol D-Pantothenyl alcohol, Provitamin B CAS NO: 81-13-0,Standard ... viscous and clear liquidLdentificationPositive reactionAssay(on dried basis)98.0%—102.0%Water≤1.0%Specific opticai rotation+29.0°- +31 ... )1.495 -1.502Heavy metals≤20ppmOrganic volatile impuritiesMeets the requirements D-Panthenol D-Pantothenyl alcohol, Provitamin B