質(zhì)量標(biāo)準(zhǔn):外觀Appearance 白色顆粒性粉末
紅外光譜鑒別Infrared spectrometry 符合
純度Purity ≥99.0% (HPLC)
熔點Melting point 136°C - 140°C
干燥損失Loss on drying <0.5 % (1 g) (vacuum)
重金屬Heavy metals (as Pb) <20 ppm
硫酸鹽灰分Sulfated ash <0.1 %
醇溶解試驗Solubility in ethanol 溶液透明((1 g in 9 ml ethanol)
游離水楊酸salicylic acid: < 0.05%
相關(guān)物質(zhì)Related substances <0.1 %
USP級
ASSAY (C9H8O4) 99.5 - 100.5 %
LOSS ON DRYING -- 0.5 %
READILY CARBONIZABLE SUBSTANCES -- TO PASS TEST
RESIDUE ON IGNITION -- 0.05 %
SUBSTANCES INSOLUBLE IN SODIUM CARBONATE -- TO PASS TEST
CHLORIDE (Cl) -- 0.014 %
SULFATE -- 0.04 %
HEAVY METALS -- 10 UG/G
FREE SALICYLIC ACID -- 0.1 %