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.

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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

tert-BUTANOL

ICSC 0114 · CAS 75-65-0

Formula: C4H10O/(CH3)3COH

tert-Butyl alcohol; 2-Methyl-2-propanol; 1,1-Dimethylethanol; Trimethyl carbinol; 2-Methylpropan-2-ol

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

tert-BUTYL ACETATE

ICSC 1445 · CAS 540-88-5

Formula: C6H12O2

Acetic acid, tert-butyl ester; Acetic acid, 1,1-dimethylethyl 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

tert-BUTYL CHROMATE

ICSC 1533 · CAS 1189-85-1

Formula: C8H18CrO4/((CH3)3CO)2CrO2

bis(tert-Butyl)chromate; Chromic acid, di-tert-butyl 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

tert-BUTYL HYDROPEROXIDE (70 % AQUEOUS SOLUTION)

ICSC 0842 · CAS 75-91-2

Formula: C4H10O2/(CH3)3COOH

1,1-Dimethylethylhydroxiperoxide; 2-Hydroperoxy-2-methylpropane

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

tert-OCTYL MERCAPTAN

ICSC 1494 · CAS 141-59-3

Formula: C8H18S/(CH3)2CSHCH2C(CH3)3

2,4,4-Trimethyl-2-pentanethiol; tert-Octanethiol; 2-Methyl-2-heptanethiol

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

TETRACHLOROETHYLENE

ICSC 0076 · CAS 127-18-4

Formula: C2Cl4/Cl2C=CCl2

PER; PCE; Ethylene Tetrachloride; PERC; Tetracap; 1,1,2,2-tetrachloroethene; 1,1,2,2-Tetrachloroethylene; Perchloroethylene; Tetrachloroethene

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

TETRACHLORONAPHTHALENE

ICSC 1387 · CAS 1335-88-2

Formula: C10H4Cl4

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

TETRACHLOROPHTHALIC ANHYDRIDE

ICSC 1374 · CAS 117-08-8

Formula: C8Cl4O3/C6Cl4(CO)2O

4,5,6,7-Tetrachloro-1,3-isobenzofurandione; 1,3-Dioxy-4,5,6,7-tetrachloroisobenzofuran

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

TETRACHLOROSILANE

ICSC 0574 · CAS 10026-04-7

Formula: SiCl4

Silicon tetrachloride; Silicon 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

TETRADIFON

ICSC 0747 · CAS 116-29-0

Formula: C12H6Cl4O2S/(C6H2Cl3)OSO(C6H4Cl)

4-Chlorophenyl 2,4,5-trichlorophenyl sulfone; 1,2,4-Trichloro-5-((4-chlorophenyl)sulfonyl)-benzene; 2,4,4',5-Tetrachlorodiphenyl sulfone

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

TETRAETHYL LEAD

ICSC 0008 · CAS 78-00-2

Formula: Pb(C2H5)4

Tetraethyl plumbane; Lead tetraethyl; TEL

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

TETRAETHYL PYROPHOSPHATE

ICSC 1158 · CAS 107-49-3

Formula: C8H20O7P2/(C2H5O)2-PO-O-PO-(OC2H5)2

TEPP; Diphosphoric acid, tetraethyl ester; Tetraethyl diphosphate

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

TETRAETHYL SILICATE

ICSC 0333 · CAS 78-10-4

Formula: (C2H5O)4Si

Tetraethoxysilane; Ethyl silicate; Tetraethyl orthosilicate

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

TETRAETHYLENE GLYCOL BUTYL ETHER

ICSC 1750 · CAS 1559-34-8

Formula: C12H26O5

3,6,9,12-Tetraoxahexadecan-1-ol; Butoxytetraethylene glycol

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

TETRAETHYLENE GLYCOL METHYL ETHER

ICSC 1749 · CAS 23783-42-8

Formula: C9H20O5/HO(CH2CH2O)4CH3

3,6,9,12-Tetraoxotridecanol; 3,6,9,12-Tetraoxatridecan-1-ol; Methoxytetraethylene glycol

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

TETRAETHYLENEPENTAMINE

ICSC 1718 · CAS 112-57-2

Formula: C8H23N5/(NH2CH2CH2NHCH2CH2)2NH

3,6,9-Triazaundecamethylenediamine; Tetrene; 1,11-Diamino-3,6,9-triazaundecane; TEPA

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

TETRAFLUOROETHYLENE

ICSC 1779 · CAS 116-14-3

Formula: C2F4

TFE; Refrigerant gas R1114; 1,1,2,2-Tetrafluoroethene; Perfluoroethylene; Perfluoroethene; Tetrafluoroethene; Ethylene tetrafluoride

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

TETRAFLUOROMETHANE

ICSC 0575 · CAS 75-73-0

Formula: CF4

Carbon tetrafluoride; Freon 14; Halon 14; PFC 14

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

TETRAFLUOROSILANE

ICSC 0576 · CAS 7783-61-1

Formula: SiF4

Silicon tetrafluoride; Silicon fluoride; Perfluorosilane

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

TETRAHYDROFURAN

ICSC 0578 · CAS 109-99-9

Formula: C4H8O/(CH2)3CH2O

Tetramethylene oxide; Diethylene oxide; 1,4-Epoxybutane; Oxacyclopentane

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

TETRAHYDROFURFURYL ALCOHOL

ICSC 1159 · CAS 97-99-4

Formula: C5H10O2

Tetrahydro-2-furylmethanol; Tetrahydro-2-furanmethanol; Tetrahydro-2-furancarbinol; 2-Hydroxymethyl oxolane

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

TETRAHYDROPHTHALIC ANHYDRIDE

ICSC 1372 · CAS 85-43-8

Formula: C8H8O3/C6H8(CO)2O

4-Cyclohexene-1,2-dicarboxylic anhydride; 3a,4,7,7a-Tetrahydro-1,3-isobenzofurandione; THPA; 1,2,3,6-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

TETRAHYDROTHIOPHENE

ICSC 0677 · CAS 110-01-0

Formula: C4H8S

Tetramethylene sulfide; Thiolane; Thiophane; Thiocyclopentane

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

TETRAMETHRIN

ICSC 0334 · CAS 7696-12-0

Formula: C19H25NO4

3,4,5,6-Tetrahydrophthalimidomethyl (1RS)-cis-trans-chrysanthemate; (1,3,4,5,6,7-Hexahydro-1,3-dioxo-2H-isoindol-2-yl)methyl 2,2-dimethyl-3-(2-methyl-1-propenyl)cyclopropanecarboxylate

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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