Glossary | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Carbon tetrachloride A chlorocarbon solvent with a high ODP (about 1.1) used primarily as a base material for the production of other chemicals. It is also considered toxic and is a probable human carcinogen (classified as a B2 carcinogen by US EPA). Its use is strictly regulated in most countries.   Cation A positively charged ion.   CFC Chlorofluorocarbon.   CFC-112 1,1,2,2-tetrachloro-1,2-difluoroethane.   CFC-113 A common designation for the most popular CFC solvent, 1,1,2-trichloro-1,2,2-trifluoroethane, with an ODP of approximately 0.8.   CFC-113a An isomer of CFC-113; 1,1,1-trichloro-2,2,2-trifluoroethane.   Chelation Chelation is the solubilization of a metal salt by forming a chemical complex or sequestering. One way of doing this is with ethylenediaminetetra-acetic acid (EDTA) salts, which have a multidentate spiral ligand form that can surround metallic and other ions.   Chlorocarbon An organic chemical composed of chlorine and carbon, e.g., carbon tetrachloride.   Chlorofluorocarbon An organic chemical composed of chlorine, fluorine, and carbon atoms, usually characterized by high stability contributing to a high ODP.   Chronic toxicity The long-term toxicity of a product in small, repeated doses. Chronic toxicity can often take many years to determine.   Cleaning The removal of soil or unwanted matter from a surface to which it clings.   Closed cup (CC) A method used to determine the flashpoint of a liquid or volatile solid.   COD Chemical oxygen demand, a test that measures the potential capacity for a microorganism to react with oxygen.   Colloid A substance that remains suspended in a solution or fails to settle out of solution.   Composite A resin combined with another material such as glass fiber in such a way that the resulting product has improved physical properties.   Curd To cause to become viscous or thickened into a coherent mass.   Conformal coating A protective material applied in a thin, uniform layer to all surfaces of a printed wiring assembly including components.   CAS number A number assigned by the Chemical Abstracts Service that uniquely identifies a chemical substance.   | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | State Information | Glossary | Conversion Checklist | Comments Home | Process Advisor | Alternatives | Links | Search All SAGE material, Copyright© 1992, Research Triangle Institute Last Update: 09 March 1999 sage@rti.org http://clean.rti.org/gloss.cfm?letter=C