Home Safety / Compounds / 4-Phenylcyclohexene (4-PCH)

4-Phenylcyclohexene (4-PCH) in your home: a safety profile

Moderate risk for your home

(Your Household-specific data is limited; this page draws from human adult context.) GHS Warning classification.

What is 4-phenylcyclohexene (4-pch)?

The IUPAC name is cyclohex-3-en-1-ylbenzene.

Also known as: cyclohex-3-en-1-ylbenzene, 4-Phenyl-1-cyclohexene, 4-PHENYLCYCLOHEXENE, 3-Cyclohexen-1-ylbenzene.

IUPAC name
cyclohex-3-en-1-ylbenzene
CAS number
4994-16-5
Molecular formula
C12H14
Molecular weight
158.24 g/mol
SMILES
C1CC(CC=C1)C1=CC=CC=C1
PubChem CID
21096

Risk for your household

Moderate risk

GHS Warning classification.

Regulatory consensus

1 regulatory bodyhas classified 4-Phenylcyclohexene (4-PCH).

AgencyYearClassificationNotes
GHS—Warning classification

Regulators apply different standards of evidence — animal-data weighting, exposure-pattern assumptions, epidemiological power thresholds — which is why two scientific bodies can review the same data and reach different conclusions. The disagreement is the data.

Where your home encounter 4-phenylcyclohexene (4-pch)

  • Indoor Air — New carpet off-gassing, SBR latex-backed carpet, Indoor air quality

Safer alternatives

Lower-risk approaches that achieve a similar outcome to 4-Phenylcyclohexene (4-PCH):

  • Process controls to minimize degradant formation
    Trade-offs: Additional manufacturing cost
    Relative cost: 1.2-2×

Frequently asked questions

What products contain 4-phenylcyclohexene (4-pch)?

4-Phenylcyclohexene (4-PCH) appears in: New carpet off-gassing (Indoor air); SBR latex-backed carpet (Indoor air).

See 4-Phenylcyclohexene (4-PCH) in the home app

Look up products containing 4-phenylcyclohexene (4-pch), compare to alternatives, and explore the full data record.

Open in home View raw API data

Sources (3)
  1. PubChem Compound CID 21096 — database
  2. EPA CompTox Chemicals Dashboard — DTXSID9047176 — epa
  3. ATSDR Toxicological Profile — CAS 4994-16-5 — reference

Reference data, not professional advice. Aggregates publicly available regulatory and scientific data; not a substitute for veterinary, medical, legal, or regulatory advice. Why we built ALETHEIA →