Papain, Carica papaya Form Solid Molar mass 21000 Unit definition 1 MCU (milk clotting unit) = 9 HDU (hemoglobin digestion units) = 6 GU (gelatin units) = 30 USP units Activity >30,000 USP units/mg pH value optimum 6.0 - 7.0 PI 8.75 Solubility Aqueous Buffers EC number 3.4.22.2 RTECS RU4950000 CAS number 9001-73-4 Merck USA index 14, 7016 商店和运输信息 Storage +2°C to +8°C Ship Ambient Temperature Only Harmful