เกรดของสารเคมี

2021-12-01 16:31:49

1. A.C.S.A - chemical grade of highest purity and meets or exceeds purity standards set by American Chemical Society (ACS).
2. Reagent - High purity generally equal to A.C.S. grade and suitable for use in many laboratory and analytical applications.
3. U.S.P. - A chemical grade of sufficient purity to meet or exceed requirements of the United States Pharmacopeia (USP); acceptable for food, drug, or medicinal use; may be used for most laboratory purposes.
4. N.F. - A grade of sufficient purity to meet or exceed requirements of the United States National Formulary. (Since bought out and merged with the United States Pharmacopeia, USP-NF.)
5. Lab -  A chemical grade of relatively high quality with exact levels of impurities unknown; usually pure enough for educational applications. Not pure enough to be offered for food, drug, or medicinal use of any kind.
6. Purified - Also called pure or practical grade, and indicates good quality chemicals meeting no official standard; can be used in most cases for educational applications. Not pure enough to be offered for food, drug, or medicinal use of any kind.
7. Technical - Good quality chemical grade used for commercial and industrial purposes. Not pure enough to be offered for food, drug, or medicinal use of any kind.