Chemical identity and waste assessment

Chemical waste disposal library

A source-linked index of chemical identities, with guidance on the information needed to classify and route chemical waste.

Technical informationSources and further reading

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4,476 reference records · 8 detailed guides

This index brings together chemical identities from the ILO / WHO International Chemical Safety Cards and the HSE GB mandatory classification and labelling list. Use the names, identifiers and available formulae to compare a product label, safety data sheet or waste inventory with the source record. Separate source entries may describe different forms or concentrations of the same substance. A match confirms only the source identity; it does not establish the composition of the waste, collection availability or a suitable treatment route. HSE identity information contains Crown copyright material reproduced under the Open Government Licence v3.0.

The detailed guides explain properties and waste-assessment points for particular chemicals. A chemical name or CAS number does not, on its own, establish a List of Waste code, packaging requirement, transport classification or receiving-facility acceptance.

Using chemical identity in a waste assessment

Identity is one part of the waste description. Concentration, process history, contamination and container condition can change the assessment even when the original product is known.

  • Identity: product name, CAS or EC number and the supplier safety data sheet.
  • Waste status: unused stock, spent process material, mixture or contaminated packaging.
  • Quantity and condition: amount, concentration, container sizes and container condition.
  • Process history: how the waste arose, including known additions, contaminants or any available analysis.
Source references and waste guidance

These sources cover chemical identity, safety data sheets and waste classification. Each has its own scope; none of them confirms that a particular waste load will be accepted by a receiving facility.

Chemical waste guides

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1,699 matching records · Clear search

Chemical reference

CHLORENDIC ANHYDRIDE

ICSC 1373 · CAS 115-27-5

Formula: C9H2Cl6O3

4,5,6,7,8,8-Hexachloro-3a,4,7,7a-tetrahydro-4,7-methanoisobenzofuran-1,3-dione; 1,4,5,6,7,7-Hexachloro-endo-5-norbornene-2,3-dicarboxylic anhydride; Hexachloro-endo-methylene tetrahydrophthalic anhydride

ILO / WHO chemical safety card

Identity reference only. The source helps identify the substance; it does not establish the composition or classification of a waste stream, or whether it will be accepted for treatment.

Reference notes and technical facts
  • Check the product label and supplier safety data sheet for the substance identity, concentration and formulation.
  • Waste assessment also depends on quantity, container condition, process history, mixing and contamination.

ILO / WHO chemical safety card

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Chemical reference

CHLORETHOXYFOS

ICSC 1681 · CAS 54593-83-8

Formula: C6H11Cl4O3PS

Phosphorothioic acid, O,O-diethyl O-(1,2,2,2-tetrachloroethyl) ester; O,O-Diethyl O-(1,2,2,2-tetrachloroethyl) phosphorothioate

ILO / WHO chemical safety card

Identity reference only. The source helps identify the substance; it does not establish the composition or classification of a waste stream, or whether it will be accepted for treatment.

Reference notes and technical facts
  • Check the product label and supplier safety data sheet for the substance identity, concentration and formulation.
  • Waste assessment also depends on quantity, container condition, process history, mixing and contamination.

ILO / WHO chemical safety card

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Chemical reference

CHLORFENVINPHOS

ICSC 1305 · CAS 470-90-6

Formula: C12H14Cl3O4P

O,O-Diethyl-O-{2-chloro-1-(2,4-dichlorophenyl)vinyl}phosphate; 2-Chloro-1-(2,4-dichlorophenyl)vinyldiethyl phosphate

ILO / WHO chemical safety card

Identity reference only. The source helps identify the substance; it does not establish the composition or classification of a waste stream, or whether it will be accepted for treatment.

Reference notes and technical facts
  • Check the product label and supplier safety data sheet for the substance identity, concentration and formulation.
  • Waste assessment also depends on quantity, container condition, process history, mixing and contamination.

ILO / WHO chemical safety card

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Chemical reference

CHLORINE

ICSC 0126 · CAS 7782-50-5

Formula: Cl2

Reference entry from an ILO / WHO International Chemical Safety Card. The card defines the chemical identity and the scope of its safety information. Check the supplier safety data sheet for the actual product or formulation.

ILO / WHO chemical safety card

Identity reference only. The source helps identify the substance; it does not establish the composition or classification of a waste stream, or whether it will be accepted for treatment.

Reference notes and technical facts
  • Check the product label and supplier safety data sheet for the substance identity, concentration and formulation.
  • Waste assessment also depends on quantity, container condition, process history, mixing and contamination.

ILO / WHO chemical safety card

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Chemical reference

CHLORINE DIOXIDE

ICSC 0127 · CAS 10049-04-4

Formula: ClO2

Chlorine oxide; Chlorine peroxide; Chlorine(IV)oxide

ILO / WHO chemical safety card

Identity reference only. The source helps identify the substance; it does not establish the composition or classification of a waste stream, or whether it will be accepted for treatment.

Reference notes and technical facts
  • Check the product label and supplier safety data sheet for the substance identity, concentration and formulation.
  • Waste assessment also depends on quantity, container condition, process history, mixing and contamination.

ILO / WHO chemical safety card

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Chemical reference

CHLORINE TRIFLUORIDE

ICSC 0656 · CAS 7790-91-2

Formula: ClF3

Chlorine fluoride; Chlorotrifluoride

ILO / WHO chemical safety card

Identity reference only. The source helps identify the substance; it does not establish the composition or classification of a waste stream, or whether it will be accepted for treatment.

Reference notes and technical facts
  • Check the product label and supplier safety data sheet for the substance identity, concentration and formulation.
  • Waste assessment also depends on quantity, container condition, process history, mixing and contamination.

ILO / WHO chemical safety card

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Chemical reference

CHLORMEPHOS

ICSC 1682 · CAS 24934-91-6

Formula: C5H12ClO2PS2

Clormethylphos; S-(Chloromethy) O,O-diethyl phosphorodithioate; Phosphorodithioic acid, S-(chloromethyl) O,O-diethyl ester

ILO / WHO chemical safety card

Identity reference only. The source helps identify the substance; it does not establish the composition or classification of a waste stream, or whether it will be accepted for treatment.

Reference notes and technical facts
  • Check the product label and supplier safety data sheet for the substance identity, concentration and formulation.
  • Waste assessment also depends on quantity, container condition, process history, mixing and contamination.

ILO / WHO chemical safety card

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Chemical reference

CHLORMEQUAT CHLORIDE

ICSC 0781 · CAS 999-81-5

Formula: (ClCH2CH2N(CH3)3)Cl/C5H13Cl2N

(2-Chloroethyl)trimethylammonium chloride; 2-Chloro-N,N,N-trimethylethanaminium chloride; Chlorocholine chloride

ILO / WHO chemical safety card

Identity reference only. The source helps identify the substance; it does not establish the composition or classification of a waste stream, or whether it will be accepted for treatment.

Reference notes and technical facts
  • Check the product label and supplier safety data sheet for the substance identity, concentration and formulation.
  • Waste assessment also depends on quantity, container condition, process history, mixing and contamination.

ILO / WHO chemical safety card

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Chemical reference

CHLOROACETALDEHYDE (40% SOLUTION)

ICSC 0706 · CAS 107-20-0

Formula: C2H3ClO/ClCH2CHO

2-Chloroacetaldehyde; 2-Chloro-1-ethanal; Monochloroacetaldehyde

ILO / WHO chemical safety card

Identity reference only. The source helps identify the substance; it does not establish the composition or classification of a waste stream, or whether it will be accepted for treatment.

Reference notes and technical facts
  • Check the product label and supplier safety data sheet for the substance identity, concentration and formulation.
  • Waste assessment also depends on quantity, container condition, process history, mixing and contamination.

ILO / WHO chemical safety card

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Chemical reference

CHLOROACETIC ACID

ICSC 0235 · CAS 79-11-8

Formula: C2H3ClO2/ClCH2COOH

Monochloroacetic acid; Chloroethanoic acid; MCA

ILO / WHO chemical safety card

Identity reference only. The source helps identify the substance; it does not establish the composition or classification of a waste stream, or whether it will be accepted for treatment.

Reference notes and technical facts
  • Check the product label and supplier safety data sheet for the substance identity, concentration and formulation.
  • Waste assessment also depends on quantity, container condition, process history, mixing and contamination.

ILO / WHO chemical safety card

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Chemical reference

CHLOROACETONE

ICSC 0760 · CAS 78-95-5

Formula: C3H5ClO/ClCH2COCH3

1-Chloro-2-propanone; Acetonyl chloride; Monochloroacetone

ILO / WHO chemical safety card

Identity reference only. The source helps identify the substance; it does not establish the composition or classification of a waste stream, or whether it will be accepted for treatment.

Reference notes and technical facts
  • Check the product label and supplier safety data sheet for the substance identity, concentration and formulation.
  • Waste assessment also depends on quantity, container condition, process history, mixing and contamination.

ILO / WHO chemical safety card

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Chemical reference

CHLOROACETONITRILE

ICSC 0844 · CAS 107-14-2

Formula: C2H2ClN/ClCH2CN

Chloroethanenitrile; Monochloroacetonitrile; Chloromethyl cyanide

ILO / WHO chemical safety card

Identity reference only. The source helps identify the substance; it does not establish the composition or classification of a waste stream, or whether it will be accepted for treatment.

Reference notes and technical facts
  • Check the product label and supplier safety data sheet for the substance identity, concentration and formulation.
  • Waste assessment also depends on quantity, container condition, process history, mixing and contamination.

ILO / WHO chemical safety card

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Chemical reference

CHLOROACETYL CHLORIDE

ICSC 0845 · CAS 79-04-9

Formula: C2H2Cl2O/ClCH2COCl

Chloroacetic acid chloride; Monochloroacetyl chloride

ILO / WHO chemical safety card

Identity reference only. The source helps identify the substance; it does not establish the composition or classification of a waste stream, or whether it will be accepted for treatment.

Reference notes and technical facts
  • Check the product label and supplier safety data sheet for the substance identity, concentration and formulation.
  • Waste assessment also depends on quantity, container condition, process history, mixing and contamination.

ILO / WHO chemical safety card

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Chemical reference

CHLOROBENZENE

ICSC 0642 · CAS 108-90-7

Formula: C6H5Cl

Benzene chloride; Chlorobenzol; Phenyl chloride

ILO / WHO chemical safety card

Identity reference only. The source helps identify the substance; it does not establish the composition or classification of a waste stream, or whether it will be accepted for treatment.

Reference notes and technical facts
  • Check the product label and supplier safety data sheet for the substance identity, concentration and formulation.
  • Waste assessment also depends on quantity, container condition, process history, mixing and contamination.

ILO / WHO chemical safety card

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Chemical reference

CHLOROBENZILATE

ICSC 0749 · CAS 510-15-6

Formula: C16H14Cl2O3

Ethyl 4,4'-dichlorobenzilate; Benzilic acid, 4,4'-dichloro-, ethyl ester; Ethyl 2-hydroxy-2,2-bis(4-chlorophenyl)acetate

ILO / WHO chemical safety card

Identity reference only. The source helps identify the substance; it does not establish the composition or classification of a waste stream, or whether it will be accepted for treatment.

Reference notes and technical facts
  • Check the product label and supplier safety data sheet for the substance identity, concentration and formulation.
  • Waste assessment also depends on quantity, container condition, process history, mixing and contamination.

ILO / WHO chemical safety card

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Chemical reference

CHLORODIFLUOROETHANE

ICSC 0643 · CAS 75-68-3

Formula: C2H3ClF2/CH3-CClF2

1-Chloro-1,1-difluoroethane; HCFC 142 b

ILO / WHO chemical safety card

Identity reference only. The source helps identify the substance; it does not establish the composition or classification of a waste stream, or whether it will be accepted for treatment.

Reference notes and technical facts
  • Check the product label and supplier safety data sheet for the substance identity, concentration and formulation.
  • Waste assessment also depends on quantity, container condition, process history, mixing and contamination.

ILO / WHO chemical safety card

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Chemical reference

CHLORODIFLUOROMETHANE

ICSC 0049 · CAS 75-45-6

Formula: CHClF2

HCFC-22; R-22; Freon R22; Monochlorodifluoromethane; Methane, chlorodifluoro-; HCFC 22; R 22

ILO / WHO chemical safety card

Identity reference only. The source helps identify the substance; it does not establish the composition or classification of a waste stream, or whether it will be accepted for treatment.

Reference notes and technical facts
  • Check the product label and supplier safety data sheet for the substance identity, concentration and formulation.
  • Waste assessment also depends on quantity, container condition, process history, mixing and contamination.

ILO / WHO chemical safety card

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Chemical reference

CHLORODIPHENYLARSINE

ICSC 1526 · CAS 712-48-1

Formula: C12H10AsCl/(C6H5)2AsCl

Diphenyl arsinous chloride; Diphenyl chloroarsine

ILO / WHO chemical safety card

Identity reference only. The source helps identify the substance; it does not establish the composition or classification of a waste stream, or whether it will be accepted for treatment.

Reference notes and technical facts
  • Check the product label and supplier safety data sheet for the substance identity, concentration and formulation.
  • Waste assessment also depends on quantity, container condition, process history, mixing and contamination.

ILO / WHO chemical safety card

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Chemical reference

CHLOROFORM

ICSC 0027 · CAS 67-66-3

Formula: CHCl3

Trichloromethane; Methane trichloride; Formyl trichloride

ILO / WHO chemical safety card

Identity reference only. The source helps identify the substance; it does not establish the composition or classification of a waste stream, or whether it will be accepted for treatment.

Reference notes and technical facts
  • Check the product label and supplier safety data sheet for the substance identity, concentration and formulation.
  • Waste assessment also depends on quantity, container condition, process history, mixing and contamination.

ILO / WHO chemical safety card

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Chemical reference

CHLOROMETHYL METHYL ETHER

ICSC 0238 · CAS 107-30-2

Formula: CH3OCH2CI/C2H5ClO

Dimethylchloro ether; Chloromethoxymethane

ILO / WHO chemical safety card

Identity reference only. The source helps identify the substance; it does not establish the composition or classification of a waste stream, or whether it will be accepted for treatment.

Reference notes and technical facts
  • Check the product label and supplier safety data sheet for the substance identity, concentration and formulation.
  • Waste assessment also depends on quantity, container condition, process history, mixing and contamination.

ILO / WHO chemical safety card

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Chemical reference

CHLORONITROANILINE

ICSC 1076 · CAS 121-87-9

Formula: C6H5ClN2O2

2-Chloro-4-nitroaniline; 1-Amino-2-chloro-4-nitrobenzene; o-Chloro-p-nitroaniline; Benzeneamine, 2-chloro-4-nitro-

ILO / WHO chemical safety card

Identity reference only. The source helps identify the substance; it does not establish the composition or classification of a waste stream, or whether it will be accepted for treatment.

Reference notes and technical facts
  • Check the product label and supplier safety data sheet for the substance identity, concentration and formulation.
  • Waste assessment also depends on quantity, container condition, process history, mixing and contamination.

ILO / WHO chemical safety card

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Chemical reference

CHLOROPENTAFLUOROETHANE

ICSC 0848 · CAS 76-15-3

Formula: C2ClF5/CClF2-CF3

1-Chloro-1,1,2,2,2-pentafluoroethane; Fluorocarbon 115; CFC 115

ILO / WHO chemical safety card

Identity reference only. The source helps identify the substance; it does not establish the composition or classification of a waste stream, or whether it will be accepted for treatment.

Reference notes and technical facts
  • Check the product label and supplier safety data sheet for the substance identity, concentration and formulation.
  • Waste assessment also depends on quantity, container condition, process history, mixing and contamination.

ILO / WHO chemical safety card

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Chemical reference

CHLOROPHACINONE

ICSC 1756 · CAS 3691-35-8

Formula: C23H15ClO3

2-[2-(4-chlorophenyl)-2-phenylacetyl]indan-1,3-dione; 2-[(4-chlorophenyl)phenylacetyl]-1H-indene-1,3(2H)-dione

ILO / WHO chemical safety card

Identity reference only. The source helps identify the substance; it does not establish the composition or classification of a waste stream, or whether it will be accepted for treatment.

Reference notes and technical facts
  • Check the product label and supplier safety data sheet for the substance identity, concentration and formulation.
  • Waste assessment also depends on quantity, container condition, process history, mixing and contamination.

ILO / WHO chemical safety card

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Chemical reference

CHLOROPRENE

ICSC 0133 · CAS 126-99-8

Formula: C4H5Cl/CH2=CClCH=CH2

2-Chloro-1,3-butadiene; 2-Chlorobutadiene; beta-Chloroprene

ILO / WHO chemical safety card

Identity reference only. The source helps identify the substance; it does not establish the composition or classification of a waste stream, or whether it will be accepted for treatment.

Reference notes and technical facts
  • Check the product label and supplier safety data sheet for the substance identity, concentration and formulation.
  • Waste assessment also depends on quantity, container condition, process history, mixing and contamination.

ILO / WHO chemical safety card

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Published by Chemical Waste Disposal. Sources checked 12 September 2026. Editorial policy.

If you spot an error in this library, please contact us so we can check the entry against its source.

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The appropriate route for chemical waste depends on the material, concentration, condition, quantity and any contamination. The reference information in this library helps with identification, but it does not confirm that a particular waste will be accepted.

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