氧化铋(III),Bismuth(III) oxide;powder, 99.999% trace metals basis
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胃蛋白酶来源于猪胃粘膜,Pepsin from porcine gastric mucosa;powder, slightly beige, 1200-2400 U/mg
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异硫氰酸胍,Guanidine thiocyanate;Powerful protein denaturant. Absorbance (1.7 M, H2O, 280 nm):0.30., ≥99% (titration)
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四氯化锡,Tin(IV) chloride;EMPLURA®, ≥99.0% (acidimetric)
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托萘酯,Tolnaftate;Pharmaceutical Secondary Standard; Certified Reference Material