AOAC Association of Official Analytical Chemists
APHA American Public Health Association
ASTM American Society for Testing and Materials
°C Degrees Celsius (or Centigrade)
DOT Department of Transportation
FDA Food and Drug Administration
gal Gallon
g Gram
HMIS Hazardous Material Identifiaction System
L Liter
M Molar
meq Milliequivalent
mg Milligram
mL Milliliter
N Normal
NFPA National Fire Protection Association
NIST National Institute of Standards and Technology
oz Ounce (liquid)
ppb Parts per Billion
ppm Parts per Million
pt Pint
Sp Gr Specific Gravity
v/v Volume/Total Volume
w/v Weight/Total Volume
w/w Weight/Total Weight
  Purity Specifications
ACS American Chemical Society
CP Chemically Pure, suitable for laboratory use
FCC Food Chemical Codex (Food Grade)
HPLC High Performance Liquid Chromatography
HRGC High Resolution Gas Chromatography
NF National Formulary
Practical Relatively high grade with small amount of impurities
Purified Chemicals of good quality where there are no official standards
SEMI Semiconductor or Electronic Grade
Tech Technical or commercial grade, mainly for industrial applications
USP United States Pharmacopeia