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

NITROUS OXIDE

ICSC 0067 · CAS 10024-97-2

Formula: N2O

Hyponitrous acid anhydride; Laughing gas; Dinitrogen oxide; Dinitrogen monoxide

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

NONANE

ICSC 1245 · CAS 111-84-2

Formula: H3C-(CH2)7-CH3/C9H20

n-Nonane; 2,2,5-Trimethylhexane

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

NONOXYNOL-9

ICSC 1558 · CAS 26571-11-9

Formula: C9H19(C6H4)(OC2H4)9OH

Nonoxynol-9; Nonyl phenoxypolyethoxyethanol

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

o-ANISIDINE

ICSC 0970 · CAS 90-04-0

Formula: C7H9NO/NH2C6H4OCH3

1-Amino-2-methoxybenzene; 2-Methoxyaniline; 2-Aminoanisole; 2-Methoxybenzenamine

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

o-CHLOROBENZALDEHYDE

ICSC 0641 · CAS 89-98-5

Formula: C7H5ClO/ClC6H4CHO

2-Chlorobenzaldehyde

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

o-CHLOROBENZYLIDENEMALONONITRILE

ICSC 1065 · CAS 2698-41-1

Formula: C10H5ClN2/ClC6H4CH=C(CN)2

[2-(Chlorophenyl)methylene]malononitrile; 2-Chlorobenzylidene malononitrile; (o-Chlorobenzal)malononitrile; beta,beta-Dicyano-o-chlorostyrene; [(2-Chlorophenyl)methylene]propanedinitrile; CS (riot control agent)

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

o-CHLOROPHENOL

ICSC 0849 · CAS 95-57-8

Formula: C6H5ClO/C6H4ClOH

2-Chlorophenol; 2-Chloro-1-hydroxybenzene; 2-Hydroxychlorobenzene

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

O-CHLOROSTYRENE

ICSC 1388 · CAS 2039-87-4

Formula: C8H7Cl

2-Chlorostyrene; 2-Chloroethenylbenzene

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

o-CRESOL

ICSC 0030 · CAS 95-48-7

Formula: C7H8O/CH3C6H4OH

2-Hydroxy-1-methylbenzene; 2-Methylphenol; ortho-Hydroxytoluene; 2-Cresol

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

o-CRESYL GLYCIDYL ETHER

ICSC 0135 · CAS 2210-79-9

Formula: C10H12O2

1,2-Epoxy-3-(o-tolyloxy)propane; Glycidyl 2-methylphenyl ether; 2,3-Epoxypropyl-o-tolyl ether; ((2-Methylphenoxy)methyl)oxirane

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

o-DIANISIDINE

ICSC 1582 · CAS 119-90-4

Formula: C14H16N2O2

3,3´-Dianisidine; 3,3´-Dimethoxy-4,4'-diaminobiphenyl; C.I. Disperse Black 6; 3,3´-Dimethoxybenzidine

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

o-NITROTOLUENE

ICSC 0931 · CAS 88-72-2

Formula: C7H7NO2/C6H4(CH3)(NO2)

2-Nitrotoluene; 1-Methyl-2-nitrobenzene; o-Methylnitrobenzene; o-Mononitrotoluene; ONT

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

o-PHENYLENEDIAMINE

ICSC 1441 · CAS 95-54-5

Formula: C6H8N2/C6H4(NH2)2

2-Aminoaniline; 1,2-Phenylenediamine; o-Diaminobenzene; 1,2-Benzenediamine

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

o-PHENYLPHENOL

ICSC 0669 · CAS 90-43-7

Formula: C12H10O/C6H5C6H4OH

1,1'-Biphenyl-2-ol; 2-Biphenylol; 2-Hydroxybiphenyl; 2-Phenylphenol

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

o-sec-BUTYLPHENOL

ICSC 1472 · CAS 89-72-5

Formula: C10H14O/C2H5(CH3)CHC6H4OH

2-sec-Butylphenol; 2-(1-Methylpropyl)phenol

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

o-TERPHENYL

ICSC 1525 · CAS 84-15-1

Formula: C18H14

1,2-Diphenylbenzene; o-Diphenylbenzene

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

o-TOLIDINE

ICSC 0960 · CAS 119-93-7

Formula: C14H16N2

3,3'-Dimethyl-(1,1'-biphenyl)-4,4'-diamine; Bianisidine; 3,3'-Dimethylbenzidine; 4,4'-Bi-o-toluidine

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

o-TOLUENESULFONAMIDE

ICSC 1581 · CAS 88-19-7

Formula: C7H9NO2S

2-Toluenesulfonamide; Toluene-2-sulfonamide; o-Methylbenzenesulfonamide

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

o-XYLENE

ICSC 0084 · CAS 95-47-6

Formula: C6H4(CH3)2/C8H10

ortho-Xylene; 1,2-Dimethylbenzene; o-Xylol

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

OCTACHLORONAPHTHALENE

ICSC 1059 · CAS 2234-13-1

Formula: C10Cl8

Perchloronaphthalene

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

OCTADECYLAMINE

ICSC 1365 · CAS 124-30-1

Formula: C18H39N

1-Octadecanamine; 1-Aminooctadecane; Stearamine; Stearylamine

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

OCTAMETHYLCYCLOTETRASILOXANE

ICSC 0310 · CAS 556-67-2

Formula: C8H24O4Si4

Cyclotetrasiloxane, octamethyl-

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

OCTANE

ICSC 0933 · CAS 111-65-9

Formula: C8H18/CH3-(CH2)6-CH3

n-Octane

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

OLEIC ACID

ICSC 1005 · CAS 112-80-1

Formula: C18H34O2/C8H17CH=CH(CH2)7COOH

9-Octadecenoic acid; 9,10-Octadecenoic acid; Oleinic acid; cis-9-Octadecenoic 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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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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