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

PHENYLMERCURIC ACETATE

ICSC 0540 · CAS 62-38-4

Formula: C8H8HgO2/CH3COOHgC6H5

Mercuriphenyl acetate; Merphenyl acetate; PMA

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

PHENYLMERCURIC NITRATE

ICSC 0541 · CAS 55-68-5

Formula: C6H5HgNO3

Mercuriphenyl nitrate; Merphenyl nitrate; Mercury, Nitratophenyl

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

PHENYLPHOSPHINE

ICSC 1424 · CAS 638-21-1

Formula: C6H7P/C6H5PH2

Phosphaniline

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

PHORATE

ICSC 1060 · CAS 298-02-2

Formula: C7H17O2PS3

O,O-Diethyl-S-(ethylthio)methyl phosphorodithioate

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

PHORONE

ICSC 1157 · CAS 504-20-1

Formula: C9H14O/(CH3)2C=CHCOCH=C(CH3)2

2,6-Dimethyl-2,5-heptadien-4-one; Diisopropylidene 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

PHOSALONE

ICSC 0797 · CAS 2310-17-0

Formula: C12H15ClNO4PS2

S-(6-chloro-2,3-dihydro-2-oxobenzoxazol-3-ylmethyl) O,O-diethyl phosphorodithioate; Benzphos

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

PHOSGENE

ICSC 0007 · CAS 75-44-5

Formula: COCl2

Carbonyl chloride; Chloroformyl 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

PHOSMET

ICSC 0543 · CAS 732-11-6

Formula: C11H12NO4PS2

O,O-Dimethyl S-phthalimidomethyl phosphorodithioate; Phosphorodithioic acid, S-((1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)methyl) O,O-dimethyl ester; O,O-Dimethyl phosphorodithioate S-ester with N-(mercaptomethyl) phthalimide

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

PHOSPHAMIDON

ICSC 0189 · CAS 13171-21-6

Formula: C10H19ClNO5P

2-Chloro-2-diethylcarbamoyl-1-methylvinyl dimethyl phosphate; 2-Chloro-3-(diethylamino)-1-methyl-3-oxo-1-propenyl dimethyl phosphate; Dimethyl phosphate ester 2-chloro-N,N-diethyl-3-hydroxycrotonamide; O,O-Dimethyl-O-(2-chloro-2-diethylcarbamoyl-1-methylvinyl) phosphate

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

PHOSPHINE

ICSC 0694 · CAS 7803-51-2

Formula: PH3

Phosphorus trihydride; Hydrogen phosphide

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

PHOSPHORIC ACID

ICSC 1008 · CAS 7664-38-2

Formula: H3O4P/H3PO4

Orthophosphoric 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

PHOSPHORIC ACID (85% AQUEOUS SOLUTION)

ICSC 1778 · CAS 7664-38-2

Formula: H3O4P/H3PO4

Orthophosphoric acid (85% solution)

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

PHOSPHORUS (YELLOW)

ICSC 0628 · CAS 12185-10-3

Formula: P4

Phosphorus tetramer; White phosphorus

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

PHOSPHORUS OXYCHLORIDE

ICSC 0190 · CAS 10025-87-3

Formula: POCl3

Phosphoryl chloride; Trichlorophosphorus oxide; Trichlorophosphine oxide

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

PHOSPHORUS PENTACHLORIDE

ICSC 0544 · CAS 10026-13-8

Formula: PCl5

Phosphoric chloride; Phosphorus perchloride

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

PHOSPHORUS PENTASULFIDE

ICSC 1407 · CAS 1314-80-3

Formula: P2S5

Diphosphorus pentasulfide; Phosphorus sulfide; Thiophosphoric 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

PHOSPHORUS PENTOXIDE

ICSC 0545 · CAS 1314-56-3

Formula: P2O5

Diphosphorus pentoxide; Phosphoric anhydride; Phosphorus pentaoxide

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

PHOSPHORUS TRICHLORIDE

ICSC 0696 · CAS 7719-12-2

Formula: PCl3

Trichlorophosphine; Phosphorous 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

PHTHALIC ACID

ICSC 0768 · CAS 88-99-3

Formula: C8H6O4/C6H4(COOH)2

1,2-Benzenedicarboxylic acid; ortho-Phthalic 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

PHTHALIC ANHYDRIDE

ICSC 0315 · CAS 85-44-9

Formula: C8H4O3/C6H4(CO)2O

1,2-Benzenedicarboxylic acid anhydride; Phthalic acid anhydride; 1,3-Isobenzofurandione

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

PHTHALODINITRILE

ICSC 0670 · CAS 91-15-6

Formula: C8H4N2/C6H4(CN)2

Phthalic acid dinitrile; 1,2-Benzenedicarbonitrile; 1,2-Dicyanobenzene; o-Benzenedinitrile

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

PICLORAM

ICSC 1246 · CAS 1918-02-1

Formula: C6H3Cl3N2O2

4-Amino-3,5,6-trichloro-2-pyridinecarboxylic acid; 4-Amino-3,5,6-trichloropicolinic 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

PICRIC ACID

ICSC 0316 · CAS 88-89-1

Formula: C6H2(NO2)3OH

2,4,6-Trinitrophenol; Picronitric acid; Phenol trinitrate; 2-Hydroxy-1,3,5-trinitrobenzene; Carbazotic acid; Carbonitric acid; Nitrophenesic acid; Nitroxanthic 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

PIGMENT RED 53, BARIUM SALT (2:1)

ICSC 1540 · CAS 5160-02-1

Formula: C17H13ClN2O4S.1/2Ba

Barium bis(2-chloro-5-((2-hydroxy-1-naphthyl)azo)toluene-4-sulphonate); D&C Red No 9

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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