Reagent A.C.S. ：ACS级试剂 This designates a high quality chemical for laboratory use. The
abbreviation"A.C.S.," means the chemical meets the specifications of
the American Chemical Society. A Certificate of Analysis is available upon
request. ACS级试剂具有很高的化学程度，符合美国化学会的要求。可以获得COA
Guaranteed Reagent
(GR)：可以用在分析化学 Suitable for use in
analytical chemistry, products meet or exceed American Chemical Society (ACS)
requirements where applicable. (EMD trademark) 必须达到，甚至比ACS的要求更严格，具有EMD 商标。
AR ：分析级试剂The standard Mallinckrodt grade of analytical reagents; suitable
for laboratoryand general use. If the reagent also meets the requirements of
the American Chemical Society Committee on Analytical Reagent, it will be
denoted as an AR(ACS) reagent. (MBI trademark) 如果符合ＡＣＳ标准，就会叫做ＡＣＳ级试剂。
Primary Standard ：初级标准品 Analytical reagent of exceptional purity that is specially
manufactured for standardizing volumetric solutions and preparing reference
standards. 非常纯的分析级试剂，专门用来标定滴定液，并且用来配制对照品。
Reagent ：试剂 The highest quality commercially available for this chemical.
The American Chemical Society has not officially set any specifications for
this material. ACS对“试剂”没有做出具体的规定。
OR ： 有机试剂 Organic reagents that are suitable for research
applications.(MBI trademark) 适用于研发阶段，为MBI商标。
Purified ：Defines chemicals of good quality where there are no official
standards. This grade is usually limited to inorganic chemicals. 当没有其他官方标准时，用purified 来定义试剂的质量，通常限于无机试剂
Practical ： Defines chemicals of good quality where there are no official
standards. Suitable for use in general applications.Practical grade organic
chemicals may contain small amounts of isomers of intermediates. 当没有其他官方标准时，用practical来定义试剂的质量，可能含有中间体的同分异构体。
Lab Grade：实验室级 A line of solvents suitable for histology methods and general
laboratory applications. 一般只适用于组织学检查和一般实验。
USP - Chemicals manufactured
under current Good Manufacturing Practices and which meet the requirements of
the US Pharmacopeia. 在GMP条件下合成的化学物，并符合USP要求。（标准可是很高的哦）
USP/GenAR - A line of
chemicals manufactured under cGMP, meet the requirements of the 1995 USP 23,
meet European Pharmacopeia (PhEur, EP) and British Pharmacopeia (BP)
specifications where designated, and are Endotoxin (LAL) tested where
appropriate. (MBI trademark)符合三大药典质量标准，并检测了内毒素。
NF - Chemicals that meet the
requirements of the National Formulary. 符合国家处方集的化学物。
FCC - Products that meet the
requirements of the Food Chemical Codex. 符合食品化学药典的要求。
CP(Chemically Pure) ：化学纯 Products of purity suitable for use in general applications. 通常条件下纯度能满足要求。
Technical ： A grade suitable for general
industrial use. 满足一般工业级要求