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| A | |
| ACL | The Approved Carriage List |
| ACLG | Approved Classification and Labelling Guide (under CHIP) |
| ACOP | Approved Code of Practice |
| ADN | Draft European Agreement concerning the International Carriage of Dangerous Goods by Inland Waterways |
| ADN Framework Directive | Proposal for a Council Directive on the approximation of laws of Member States with regard to the transport of dangerous goods by inland waterway |
| ADNR | Regulations for the Carriage of Dangerous Substances on the Rhine |
| ADR | The European Agreement concerning the International Carriage of Dangerous Goods by Road |
| ADR Framework Directive | Council Directive 94/55/EC on the approximation of laws of Member States with regard to the transport of dangerous goods by road |
| AIT | Auto-Ignition Temperature - temperature at which the vapours will ignite in air without an ignition source. |
| ASL | Approved Supply List |
| ATR | Approved Tank Requirements |
| AVR | Approved Vehicle Requirements |
| B | |
| BCF | Bioconcentration factor |
| BOD | Biochemical Oxygen Demand |
| BP | Boiling Point |
| Bq | Becquerel (unit of radioactivity) |
| BS | British Standard |
| BSI | British Standards Institution |
| C | |
| CAA | Civil Aviation Authority |
| Carc | Carcinogen |
| CAS | Chemical Abstracts Series number |
| Cat | Category (used in relation to carcinogens, mutagens and repro-toxics) |
| CD | Consultative Document |
| CDGCPL2 | The Carriage of Dangerous Goods (Classification, Packaging and Labelling) and Use of Transportable Pressure Receptacles Regulations 1996 |
| CDGRail2 | The Carriage of Dangerous Goods by Rail Regulations 1996 |
| CDGRoad | The Carriage of Dangerous Goods by Road Regulations 1996 |
| CEFIC | European Council of Chemical Manufacturers' Federation |
| CEN | Comité Europeén de Normalisation (European Committee for Standardisation) |
| CER2 | The Carriage of Explosives by Road Regulations 1996 |
| CHIP3 | Chemicals (Hazard Information and Packaging for Supply) Regulations 2002 |
| CIA | Chemical Industries Association |
| CIM | Uniform Rules concerning the Contract for International Carriage of Goods by Rail (Appendix B to COTIF) |
| CLER | The Classification and Labelling of Explosives Regulations 1983 |
| CMR | Convention Marchandise Routier (legally recognised convention regulating conditions of international carriage by road) |
| CMRs | Carcinogenic, Mutagenic and Repro-toxic substances |
| COD | Chemical Oxygen Demand |
| Contact Sensitizer | substance that will induce an allergic response following skin contact. |
| COSHH | Control of Substances Hazardous to Health Regulations |
| COTIF | Convention concerning the International Carriage of Goods by Rail |
| CRC | Child Resistant Closure |
| Critical Temperature | the temperature above which a pure gas cannot be liquefied, regardless of the degree of compression. |