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

4-CHLORO-m-CRESOL

ICSC 0131 · CAS 59-50-7

Formula: C7H7ClO/C6H3OHCH3Cl

p-Chloro-m-cresol; 2-Chloro-5-hydroxytoluene; 4-Chloro-3-methylphenol

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

4-CHLOROANILINE

ICSC 0026 · CAS 106-47-8

Formula: C6H6ClN/ClC6H4NH2

Chloroaminobenzene, p-; Chloroaniline, p-

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

4-CHLOROTOLUENE

ICSC 1386 · CAS 106-43-4

Formula: C7H7Cl

p-Chlorotoluene; 1-Chloro-4-methylbenzene; p-Tolyl 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

4-DIMETHYLAMINOAZOBENZENE

ICSC 1498 · CAS 60-11-7

Formula: C14H15N3/C6H5N=NC6H4N(CH3)2

N,N-Dimethyl-4-phenylazobenzenamine; p-Dimethylaminoazobenzene; N,N-Dimethyl-p-(phenylazo)aniline; C.I. 11020; Fast yellow; Solvent yellow 2

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

4-METHOXY-4-METHYL-2-PENTANONE

ICSC 1098 · CAS 107-70-0

Formula: C7H14O2

4-Methoxy-4-methylpentan-2-one; 4-Methyl-4-methoxy-2-pentanone; 4-Methoxy-4-methylpentanone-2

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

4-METHOXYPHENOL

ICSC 1097 · CAS 150-76-5

Formula: C7H8O2/OH(C6H4)OCH3

Hydroquinone monomethyl ether; Mequinol; p-Hydroxyanisole

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

4-METHYLCYCLOHEXANOL

ICSC 0296 · CAS 589-91-3

Formula: C7H14O

p-Methylcyclohexanol; 4-Hexahydromethylphenol; p-Hexahydromethylphenol

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

4-METHYLPYRIDINE

ICSC 0803 · CAS 108-89-4

Formula: C6H7N/(C5H4N)CH3

4-Picoline; gamma-picoline; p-Picoline

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

4-NITRO-N-PHENYLBENZENAMINE

ICSC 0804 · CAS 836-30-6

Formula: C12H10N2O2/C6H5(NH)C6H4(NO2)

p-Nitrophenylphenylamine; 4-Nitro-N-phenylaniline; 4-Nitrodiphenylamine; p-Nitrodiphenylamine

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

4-NITRO-o-PHENYLENEDIAMINE

ICSC 1543 · CAS 99-56-9

Formula: C6H7N3O2/C6H3(NH2)2NO2

4-Nitro-1,2-benzenediamine; 1,2-Diamino-4-nitrobenzene; 2-Amino-4-nitroaniline

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

4-NITROANILINE

ICSC 0308 · CAS 100-01-6

Formula: C6H6N2O2

p-Nitroaniline; 1-Amino-4-nitrobenzene; C.I. 37035

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

4-NITROBENZOIC ACID

ICSC 1684 · CAS 62-23-7

Formula: C7H5NO4/HOOCC6H4NO2

para-Nitrobenzoic acid; para-Carboxynitrobenzene

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

4-NITROBIPHENYL

ICSC 1395 · CAS 92-93-3

Formula: C12H9NO2

p-Nitrobiphenyl; p-Nitrodiphenyl

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

4-NONYLPHENOL (BRANCHED)

ICSC 0309 · CAS 84852-15-3

Formula: C15H24O

Phenol, 4-nonyl, branched

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

4-THIAPENTANAL

ICSC 0515 · CAS 3268-49-3

Formula: C4H8OS/CH3SCH2CH2CHO

beta-(Methylmercapto) propionaldehyde; beta-(Methylthio) propionaldehyde; Methional

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

4-VINYL TOLUENE

ICSC 0735 · CAS 622-97-9

Formula: CH3C6H4CH=CH2/C9H10

p-Methyl styrene; 1-Ethenyl-4-methylbenzene; p-Vinyl toluene

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

4-VINYLCYCLOHEXENE

ICSC 1177 · CAS 100-40-3

Formula: C6H9CH=CH2/C8H12

4-Ethenyl-1-cyclohexene; Cyclohexenylethylene

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

4,4'-METHYLENE BIS(2-CHLOROANILINE)

ICSC 0508 · CAS 101-14-4

Formula: C13H12Cl2N2

Benzenamine, 4,4'-methylenebis(2-chloro-); 2,2'-Dichloro-4,4'-methylenedianiline; 4,4'-Diamino-3,3'-dichlorodiphenylmethane; MOCA; MBOCA

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

4,4'-METHYLENEDIANILINE

ICSC 1111 · CAS 101-77-9

Formula: C13H14N2/NH2C6H4CH2C6H4NH2

4,4'-Diaminodiphenylmethane; 4,4'-Methylenebisbenzenamine; MDA

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

4,4'-OXYBIS(BENZENESULPHONYL HYDRAZIDE)

ICSC 1285 · CAS 80-51-3

Formula: C12H14N4O5S2/H2NHNO2SC6H4OC6H4SO2NHNH2

Benzenesulfonic acid, 4,4'-oxybis-, dihydrazide; 4,4'-Oxydi(benzenesulphonohydrazide); Diphenyloxide 4,4'-sulphonylhydrazide; p,p'-Oxybisbenzenesulphonyl hydrazide

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

5-ETHYL-2-METHYLPYRIDINE

ICSC 1772 · CAS 104-90-5

Formula: C8H11N

5-Ethyl-2-picoline ; 2-Methyl-5-ethylpyridine; Pyridine, 5-ethyl-2-methyl; MEP

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

5-ETHYLIDENE-2-NORBORNENE (stabilized)

ICSC 0473 · CAS 16219-75-3

Formula: C9H12

ENB; 5-Ethylidenebicyclo(2,2,1)hept-2-ene; Ethylidene norbornene

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

5-METHYL-3-HEPTANONE

ICSC 1391 · CAS 541-85-5

Formula: C8H16O

5-Methyl heptan-3-one; 3-Heptanone, 5-methyl; Ethyl amyl ketone; Ethyl sec-amyl 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

ACENAPHTHENE

ICSC 1674 · CAS 83-32-9

Formula: C12H10

1,2-Dihydroacenaphthylene; 1,8-Ethylenenaphthalene

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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