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

METHYL ISOCYANATE

ICSC 0004 · CAS 624-83-9

Formula: CH3NCO

Isocyanatomethane; Isocyanic acid, methyl 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

METHYL MERCAPTAN

ICSC 0299 · CAS 74-93-1

Formula: CH3SH

Methanethiol; Mercaptomethane; Methyl sulfhydrate; Thiomethanol

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

METHYL METHACRYLATE

ICSC 0300 · CAS 80-62-6

Formula: CH2C(CH3)COOCH3/C5H8O2

Methacrylic acid methyl ester; Methyl 2-methylpropenoate

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

METHYL n-AMYL KETONE

ICSC 0920 · CAS 110-43-0

Formula: C7H14O/CH3(CH2)4COCH3

2-Heptanone; Amyl methyl ketone; Methyl pentyl ketone

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

METHYL PARATHION

ICSC 0626 · CAS 298-00-0

Formula: C8H10NO5PS

O,O-Dimethyl O-4-nitrophenyl phosphorothioate; O,O-Dimethyl-p-nitrophenylthionophosphate; Phosphorothioic acid, O,O-dimethyl O-(4-nitrophenyl) 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

METHYL PROPIONATE

ICSC 1029 · CAS 554-12-1

Formula: C4H8O2/C2H5COOCH3

Propanoic acid, methyl 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

METHYL PROPYL KETONE

ICSC 0816 · CAS 107-87-9

Formula: C5H10O/CH3(CH2)2COCH3

2-Pentanone; Ethyl acetone; MPK

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

METHYL SALICYLATE

ICSC 1505 · CAS 119-36-8

Formula: C8H8O3

Birch oil; Wintergreen oil; Methyl-2-hydroxybenzoate; 2-(Methoxycarbonyl)phenol; o-Hydroxybenzoic acid, methyl ester; Salicylic acid, methyl 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

METHYL SILICATE

ICSC 1188 · CAS 681-84-5

Formula: C4H12O4Si/(CH3O)4Si

Tetramethyl silicate; Tetramethyl orthosilicate; Tetramethoxy silane

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

METHYL TERT-BUTYL ETHER

ICSC 1164 · CAS 1634-04-4

Formula: (CH3)3COCH3/C5H12O

tert-Butyl methyl ether; MTBE; Methyl-1,1-dimethylethyl ether; 2-Methoxy-2-methyl propane

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

METHYL VINYL KETONE

ICSC 1495 · CAS 78-94-4

Formula: C4H6O

3-Buten-2-one; Methylene acetone

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

METHYLACETOACETATE

ICSC 1086 · CAS 105-45-3

Formula: C5H8O3

Acetoacetic acid methyl ester; Butanoic acid, 3-oxo-, methyl ester; 1-Methoxybutane-1,3-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

METHYLAL

ICSC 1152 · CAS 109-87-5

Formula: C3H8O2/CH2-(OCH3)2

Dimethoxymethane; Formal; Formaldehyde dimethylacetal; Methylene dimethylether

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

METHYLAMINE

ICSC 0178 · CAS 74-89-5

Formula: CH5N/CH3NH2

Methanamine; Aminomethane; Monomethylamine

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.

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Chemical reference

METHYLAMINE (40% aqueous solution)

ICSC 1483 · CAS 74-89-5

Formula: CH5N/CH3NH2

Methanamine; Aminomethane; Monomethylamine

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.

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Chemical reference

METHYLARSONIC ACID

ICSC 0755 · CAS 124-58-3

Formula: CH3AsO(OH)2/CH5AsO3

Methanearsonic acid; Monomethylarsinic acid; MMA; Monomethylarsonate

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

METHYLCHLOROSILANE

ICSC 1587 · CAS 993-00-0

Formula: CH5ClSi

Chloro(methyl) silane

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

METHYLCYCLOHEXANE

ICSC 0923 · CAS 108-87-2

Formula: C7H14/C6H11CH3

Hexahydrotoluene; Cyclohexylmethane

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.

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Chemical reference

METHYLCYCLOHEXANOL (MIXED ISOMERS)

ICSC 0292 · CAS 25639-42-3

Formula: C7H14O

Hexahydromethylphenol; Hexahydrocresol

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

METHYLCYCLOPENTADIENYL MANGANESE TRICARBONYL

ICSC 1169 · CAS 12108-13-3

Formula: C9H7MnO3

MMT

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

METHYLDIBROMOGLUTARONITRILE

ICSC 1546 · CAS 35691-65-7

Formula: C6H6Br2N2

Glutaronitrile, 2-bromo-2-(bromomethyl)-; 1,2-Dibromo-2,4-dicyanobutane; 2-Bromo-2-(bromomethyl)pentanedinitrile

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

METHYLDICHLOROSILANE

ICSC 0297 · CAS 75-54-7

Formula: CH4Cl2Si/CH3SiHCl2

Dichloromethylsilane; Monomethyldichlorosilane

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

METHYLENE BIS(THIOCYANATE)

ICSC 1287 · CAS 6317-18-6

Formula: C3H2N2S2/SCNCH2SCN

Thiocyanic acid, methylene ester; Methylene dithiocyanate

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

METHYLENE BISPHENYL ISOCYANATE

ICSC 0298 · CAS 101-68-8

Formula: C15H10N2O2/OCNC6H4CH2C6H4NCO

Diphenylmethane-4.4'-diisocyanate; bis(1,4-Isocyanatophenyl)methane; MDI; 4,4'-Methylenediphenyldiisocyanate

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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