| Chemical | Method Number | Method Name | Compounds |
|---|---|---|---|
| Cadmium | 7300 | ELEMENTS by ICP | 7300cpds |
| Cadmium & compounds | 7048 | CADMIUM and cpds, as Cd | |
| Calcium | 7300 | ELEMENTS by ICP | 7300cpds |
| Calcium & compounds | 7020 | CALCIUM and cpds as Ca | |
| Camphor | 1301 | KETONES II | 1301cpds |
| Capsaicin | 5041 | CAPSAICIN and DIHYDROCAPSAICIN | |
| Carbaryl (Sevin) | 5006 | CARBARYL | |
| Carbitol | 2549 | VOLATILE ORGANIC CPDS (Screening) | |
| Carbon black | 5000 | CARBON BLACK | |
| Carbon dioxide | 6603 | CARBON DIOXIDE | |
| Carbon disulfide | 1600 | CARBON DISULFIDE | |
| Carbon monoxide | 6604 | CARBON MONOXIDE | |
| Carbon tetrachloride | 1003 | HYDROCARBONS, HALOGENATED | 1003cpds |
| Carbon, elemental | 5040 | ELEMENTAL CARBON (DIESEL EXHAUST) | |
| delta 3 Carene | 1552 | TERPENES | |
| Chlordane | 5510 | CHLORDANE | |
| Chlorinated camphene | 5039 | CHLORINATED CAMPHENE | |
| Chlorinated diphenyl oxide | 5025 | CHLORINATED DIPHENYL OXIDE | |
| Chlorinated terphenyl | 5014 | CHLORINATED TERPHENYL | |
| Chlorine | 6011 | CHLORINE and BROMINE | |
| Chloroacetaldehyde | 2015 | CHLOROACETALDEHYDE | |
| Chloroacetic acid | 2008 | CHLOROACETIC ACID | |
| Chlorobenzene | 1003 | HYDROCARBONS, HALOGENATED | 1003cpds |
| Chlorobromomethane | 1003 | HYDROCARBONS, HALOGENATED | 1003cpds |
| Chlorodifluoromethane | 1018-3 | DICHLORODIFLUOROMETHANE | |
| Chlorodifluoromethane | 1018-2 | DICHLORODIFLUOROMETHANE | |
| Chlorodifluoromethane | 1018-1 | DICHLORODIFLUOROMETHANE | |
| Chlorodiphenyl (42% & 54% CI) | 5503 | POLYCHLOROBIPHENYLS | |
| 2 Chloroethanol | 2513 | ETHYLENE CHLOROHYDRIN | |
| Chloroform | 1003 | HYDROCARBONS, HALOGENATED | 1003cpds |
| 4 Chloronitrobenzene | 2005 | NITROBENZENES | 2005cpds |
| p Chlorophenol | 2014 | p CHLOROPHENOL | |
| Chloroprene | 1002 | CHLOROPRENE | |
| Chlorpyrifos | 5600 | ORGANOPHOSPHORUS PESTICIDES | |
| Chromic acid | 7604 | CHROMIUM, HEXAVALENT | |
| Chromic acid | 7600 | CHROMIUM, HEXAVALENT | |
| Chromium | 7024 | CHROMIUM and cpds, as Cr | |
| Chromium | 7300 | ELEMENTS by ICP | 7300cpds |
| Chromium, hexavalent | 7600 | CHROMIUM, HEXAVALENT | |
| Chromium, hexavalent | 7604 | CHROMIUM, HEXAVALENT | |
| Chromium, hexavalent | 9101 | CHROMIUM, HEXAVALENT in settled dust | |
| Chrysene | 5506 | POLYNUCLEAR AROMATIC HYDROCARBONS | 5506cpds |
| Chrysene | 5515 | POLYNUCLEAR AROMATIC HYDROCARBONS | |
| Coal tar naphtha | 1550 | NAPHTHAS | 1550cpds |
| Coal tar pitch volatiles | OSHA-58 | COAL TAR PITCH VOLATILES | |
| Cobalt | 7300 | ELEMENTS by ICP | 7300cpds |
| Cobalt & compounds | 7027 | COBALT and cpds, as Co | |
| Copper | 7300 | ELEMENTS by ICP | 7300cpds |
| Copper (dust & fume) | 7029 | COPPER (dust & fumes) | |
| Cresol | 2549 | VOLATILE ORGANIC CPDS (Screening) | |
| Cresol, all isomers | 2546 | CRESOLS and PHENOL | |
| Crotonaldehyde | 2539 | ALDEHYDES, SCREENING | |
| Crotonaldehyde | 3516 | CROTONALDEHYDE | |
| Cryofluorane | 1018-2 | DICHLORODIFLUOROMETHANE, 1,2 DICHLOROTETRAFLUORO E | |
| Cryofluorane | 1018-3 | DICHLORODIFLUOROMETHANE, 1,2 DICHLOROTETRAFLUORO E | |
| Cryofluorane | 1018-1 | DICHLORODIFLUOROMETHANE, 1,2 DICHLOROTETRAFLUORO E | |
| Cumene | 1501 | HYDROCARBONS, AROMATIC | |
| Cyanides | 7904 | CYANIDES, aerosol and gas | |
| Cyanides | 6010 | HYDROGEN CYANIDE | |
| Cyanuric acid | 5030 | CYANURIC ACID | |
| Cyclohexane | 1500 | HYDROCARBONS, BP 36 126 C | 1500cpds |
| Cyclohexanol | 1402 | ALCOHOLS III | 1402cpds |
| Cyclohexanone | 2549 | VOLATILE ORGANIC CPDS (Screening) | |
| Cyclohexanone | 1300 | KETONES I | 1300cpds |
| Cyclohexene | 1500 | HYDROCARBONS, BP 36 126 C | 1500cpds |
| 1,3 Cyclopentadiene | 2523 | 1,3 CYCLOPENTADIENE |
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