GHS REFERENCE / H-CODES / H351

H351 — Suspected of causing cancer

The GHS hazard statement for carcinogenicity, category 2. Here is what it means, the label elements that travel with it, and the substances that carry it.

At a glance

Official statementSuspected of causing cancer.
Hazard classCarcinogenicity
CategoryCategory 2
Signal wordWarning
PictogramGHS08 Health hazardGHS08 — Health hazard

What it means

May cause cancer (Category 1: known or presumed human carcinogen; Category 2: suspected). The category reflects strength of evidence, not potency.

Precautionary statements paired with H351

When the engine writes SDS Section 2 or a container label for a product carrying H351, these are the P-codes it assigns, in the official Annex 3 groups:

PreventionP201Obtain special instructions before use.
P202Do not handle until all safety precautions have been read and understood.
P280Wear protective gloves/protective clothing/eye protection/face protection.
ResponseP308IF exposed or concerned:
P313Get medical advice/attention.
StorageP405Store locked up.
DisposalP501Dispose of contents/container in accordance with local/regional/national/international regulations.

Substances that carry H351

227 of the 4,225 substances in our database carry H351 when classified in pure form — recognizable examples:

  • dichloromethane — CAS 75-09-2
  • tetrahydrofuran — CAS 109-99-9
  • naphthalene — CAS 91-20-3
  • chloroform — CAS 67-66-3

Same hazard class: H350

Reference information, not legal or professional advice. Statement texts and allocations follow GHS Rev 9 / 29 CFR 1910.1200 Appendix C as implemented by our classification engine; the regulatory text and agency practice control. Claims last reviewed July 23, 2026.

The engine writes these for you.

When SDS HQ authors an SDS or a container label, it assigns the hazard statements, signal word, pictograms, and precautionary statements from these same tables — automatically, with the calculation shown.

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