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

2,3-BUTANEDIONE

ICSC 1168 · CAS 431-03-8

Formula: CH3COCOCH3/C4H6O2

Diacetyl; Dimethylglyoxal; Dimethyl diketone; 2,3-Diketobutane; Butanedione

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

2,3-DICHLORO-1-NITROBENZENE

ICSC 0251 · CAS 3209-22-1

Formula: C6H3Cl2NO2

2,3-Dichloronitrobenzene; 1,2-Dichloro-3-nitrobenzene; 1-Nitro-2,3-dichlorobenzene

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

2,3-DICHLOROANILINE

ICSC 0140 · CAS 608-27-5

Formula: C6H5Cl2N/(C6H3)Cl2(NH2)

2,3-Dichlorobenzenamine

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

2,3-DINITROTOLUENE

ICSC 0726 · CAS 602-01-7

Formula: C6H3CH3(NO2)2/C7H6N2O4

1-Methyl-2,3-dinitrobenzene; 2,3-DNT

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

2,3-XYLIDINE

ICSC 0451 · CAS 87-59-2

Formula: C8H11N/(CH3)2C6H3NH2

2,3-Dimethylaniline; 2,3-Dimethylbenzeneamine; 1-Amino-2,3-dimethylbenzene; 3-Amino-o-xylene; 3-Amino-1,2-xylene

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

2,3,3,3-TETRAFLUOROPROPENE

ICSC 1776 · CAS 754-12-1

Formula: C2H2F4/CH2CFCF3

2,3,3,3-Tetrafluoroprop-1-ene; HFO-1234yf; R1234YF

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

2,3,4-TRICHLORO-1-BUTENE

ICSC 0587 · CAS 2431-50-7

Formula: C4H5Cl3

2,3,4-Trichlorobutene-1

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

2,3,4-TRICHLOROPHENOL

ICSC 0588 · CAS 15950-66-0

Formula: C6H3Cl3O

Phenol, 2,3,4-trichloro-; 1-Hydroxy-2,3,4-trichlorobenzene

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

2,3,4,6-TETRACHLOROPHENOL

ICSC 1089 · CAS 58-90-2

Formula: C6H2Cl4O

2,4,5,6-Tetrachlorophenol; Phenol, 2,3,4,6-tetrachloro-

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

2,3,5-TRICHLOROPHENOL

ICSC 0589 · CAS 933-78-8

Formula: C6H3Cl3O

Phenol, 2,3,5-trichloro-; 1-Hydroxy-2,3,5-trichlorobenzene

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

2,3,5,6-TETRACHLOROPHENOL

ICSC 0573 · CAS 935-95-5

Formula: C6H2Cl4O

Phenol, 2,3,5,6-tetrachloro-; 2,3,5,6-Tetrachlorohydroxybenzene

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

2,3,6-TRICHLOROPHENOL

ICSC 0590 · CAS 933-75-5

Formula: C6H3Cl3O

Phenol, 2,3,6-trichloro-; 1-Hydroxy-2,3,6-trichlorobenzene

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

2,3,7,8-TETRACHLORODIBENZO-p-DIOXIN

ICSC 1467 · CAS 1746-01-6

Formula: C12H4Cl4O2

Dibenzo [b,e] [1,4]dioxin, 2,3,7,8-tetrachloro-; 2,3,7,8-TCDD; 2,3,7,8-Tetrachloro-1,4-dioxin

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

2,4-D

ICSC 0033 · CAS 94-75-7

Formula: C8H6Cl2O3/Cl2C6H3OCH2COOH

2,4-Dichlorophenoxyacetic acid; 2,4-D acid

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

2,4-DIAMINO-6-PHENYL-1,3,5-TRIAZINE

ICSC 1680 · CAS 91-76-9

Formula: C9H9N5/C6H5(C3N3)(NH2)2

6-Phenyl-1,3,5-triazine- 2,4-diyldiamine; Benzoguanamine; 6-Phenyl-1,3,5-triazine- 2,4-diamine

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

2,4-DIAMINOANISOLE

ICSC 1578 · CAS 615-05-4

Formula: C7H10N2O

1,3-Benzenediamine, 4-methoxy-; 4-Methoxy-3-phenylenediamine; 4-Methoxy-m-phenylenediamine; C.I. Oxidation Base 12

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

2,4-DICHLOROANILINE

ICSC 0141 · CAS 554-00-7

Formula: C6H5Cl2N

Aniline, 2,4-dichloro-; 1-Amino-2,4-dichlorobenzene; 2,4-Dichlorobenzenamine

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

2,4-DICHLOROPHENOL

ICSC 0438 · CAS 120-83-2

Formula: C6H4Cl2O

2,4-DCP; 2,4-Dichlorohydroxybenzene; 1-Hydroxy-2,4-dichlorobenzene

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

2,4-DICHLOROTOLUENE

ICSC 1727 · CAS 95-73-8

Formula: C7H6Cl2

2,4-Dichloro-1-methylbenzene; Benzene, 2,4-dichloro-1-methyl-; Toluene, 2,4-dichloro-

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

2,4-DINITROANILINE

ICSC 1107 · CAS 97-02-9

Formula: C6H5N3O4/C6H3(NH2)(NO2)2

2,4-Dinitrobenzenamine; 2,4-Dinitrophenylamine; 1-Amino-2,4-dinitrobenzene

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

2,4-DINITROPHENOL

ICSC 0464 · CAS 51-28-5

Formula: C6H4N2O5/C6H3(OH)(NO2)2

Phenol, 2,4-dinitro; 1-Hydroxy-2,4-dinitrobenzene

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

2,4-DINITROTOLUENE

ICSC 0727 · CAS 121-14-2

Formula: C7H6N2O4/C6H3CH3(NO2)2

1-Methyl-2,4-dinitrobenzene; 2,4-DNT

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

2,4-PENTADIONE

ICSC 0533 · CAS 123-54-6

Formula: C5H8O2/CH3COCH2COCH3

Acetyl 2-propanone; Acetoacetone; Acetyl acetone; Pentane-2,4-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

2,4-TOLUENE DIISOCYANATE

ICSC 0339 · CAS 584-84-9

Formula: C9H6N2O2/CH3C6H3(NCO)2

2,4TDI; 4-Methyl-meta-phenylene diisocyanate; 2,4-Diisocyanatotoluene; 2,4-Diisocyanato-1-methylbenzene

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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