Naphthalene

CAS 91-20-3·C10H8·128.17 g/mol·19 listings across 8 jurisdictions.

Also known as naftaleno, naftalina, naphtalene, naphtaline … +15 more

CAS
91-20-3
Mol. Weight
128.17000 g/mol
InChIKey
UFWIBTONFRDIAS-UHFFFAOYSA-N
SMILES
c1ccc2ccccc2c1
PubChem CID
931

Regulatory
Status

19 entries across 8 jurisdictions. Sourced from EU, US, UK and international regulatory databases.

Overall compliance

Restricted — high concern

High-concern classification in 13 of 19 frameworks, across 8 jurisdictions.

United StatesUnited States[US]
EPA Hazardous Air Pollutants (Clean Air Act)
EPA CAA
Listed
View →

Hazardous air pollutants under the U.S. Clean Air Act; a listing means emissions of the substance are federally regulated.

{
  "notes": "",
  "cas_number": "91-20-3",
  "chemical_name": "Naphthalene"
}
EPA Chemical Evaluation and Prioritization Network
EPA CEPN
Listed
View →

EPA's chemical evaluation and prioritisation network; a listing means the substance is being tracked for screening and risk prioritisation.

{
  "notes": "Batch 2",
  "priority": "High",
  "cas_number": "91-20-3",
  "chemical_name": "Naphthalene",
  "designation_date": "2021-06-30"
}
EPA Toxic Release Inventory (TRI)
EPA TRI
Listed
View →

EPA's Toxics Release Inventory; a listing means facilities must publicly report releases and transfers of the substance.

{
  "notes": "PAH; moth repellent",
  "category": "individually_listed",
  "cas_number": "91-20-3",
  "chemical_name": "Naphthalene"
}
California Proposition 65
PROP65
Listed
View →

California Proposition 65; a listing means the substance is known to the state to cause cancer or reproductive harm and requires a warning.

{
  "source": "OEHHA Proposition 65 List",
  "cas_number": "91-20-3",
  "date_listed": "2002-04-19 00:00:00",
  "nsrl_or_madl": "5.8",
  "chemical_name": "Naphthalene",
  "type_of_toxicity": "cancer",
  "listing_mechanism": "AB"
}
TSCA Inventory
TSCA
Listed
View →

The U.S. TSCA Inventory; a listing means the substance is an existing chemical permitted in U.S. commerce.

{
  "name": "Naphthalene",
  "flags": "",
  "status": "active",
  "cas_number": "91-20-3",
  "risk_level": "low"
}
European UnionEuropean Union[EU]
CLP Regulation (EC) 1272/2008
CLP
Listed
View →

The EU's classification, labelling and packaging rules; a listing assigns the substance harmonised hazard classes such as carcinogenic, toxic, or corrosive.

{
  "source": "ECHA CLP Annex VI (harmonised C&L)",
  "index_no": "601-052-00-2",
  "ec_number": "202-049-5",
  "cas_number": "91-20-3",
  "hazard_class": "Carc. 2\nAcute Tox. 4 *\nAquatic Acute 1\nAquatic Chronic 1",
  "chemical_name": "naphthalene",
  "hazard_statements": "H351\nH302\nH400\nH410"
}
EU List of CMR Substances
EU CMR
Listed
View →
{
  "source": "Derived from EU CLP Annex VI (harmonised C&L) — CMR subset",
  "index_no": "601-052-00-2",
  "cmr_class": "Carc. 2",
  "ec_number": "202-049-5",
  "cas_number": "91-20-3",
  "chemical_name": "naphthalene",
  "hazard_statements": "H351\nH302\nH400\nH410"
}
EU Cosmetics – Prohibited substances (Annex II)
EU COSM PROHIBITED
Listed
View →

EU prohibited cosmetic substances (Annex II); a listing means the substance is banned from cosmetic products.

{
  "annex": "II",
  "source": "EU CosIng Annex II",
  "function": "",
  "ec_number": "202-049-5",
  "inci_name": "",
  "reference": "",
  "cas_number": "91-20-3",
  "restriction": "",
  "chemical_name": "91-20-3"
}
EU REACH Registered Substances
EU REACH REGISTERED
Listed
View →
{
  "source": "EU REACH Registered Substances (ECHA CHEM)",
  "ec_number": "202-049-5",
  "cas_number": "91-20-3",
  "chemical_name": "Naphthalene"
}
EU Water Framework Directive Priority Substances
EU WFD
Listed
View →

The EU Water Framework Directive priority list; a listing means the substance is a priority pollutant with environmental quality standards for surface water.

{
  "annex": "X",
  "notes": "",
  "cas_number": "91-20-3",
  "chemical_name": "Naphthalene",
  "priority_status": "Priority Substance"
}
REACH Restrictions (Annex XVII)
REACH ANNEX XVII
Listed
View →

REACH Restrictions (Annex XVII); a listing means the substance's manufacture, use, or sale is restricted under defined conditions.

{
  "source": "ECHA REACH Annex XVII (Restrictions)",
  "entry_no": "50a",
  "ec_number": "202-049-5",
  "cas_number": "91-20-3",
  "conditions": "https://echa.europa.eu/documents/10162/2b2f0a5d-a75d-7aa4-fc01-6208b17a52ce",
  "description": "",
  "chemical_name": "Naphthalene"
}
United KingdomUnited Kingdom[UK]
GB Mandatory Classification & Labelling
GB MCL
Listed
View →

Great Britain's mandatory classification & labelling; a listing assigns the substance legally binding GB hazard classifications.

{
  "source": "GB MCL (HSE)",
  "ec_number": "202-049-5",
  "cas_number": "91-20-3",
  "hazard_class": "Carc. 2; Acute Tox. 4 *; Aquatic Acute 1; Aquatic; Chronic 1",
  "chemical_name": "naphthalene",
  "hazard_statements": "H351; H302; H400; H410"
}
International[INTERNATIONAL]
IARC Carcinogen Classification
IARC
Listed
View →

The WHO/IARC carcinogen classification; a listing assigns the substance a cancer-hazard group, e.g. Group 1 (carcinogenic to humans).

{
  "source": "IARC Monographs",
  "volume": "82",
  "cas_number": "91-20-3",
  "iarc_group": "2B",
  "chemical_name": "Naphthalene",
  "evaluation_year": "2002"
}
CanadaCanada[CANADA]
Canada CEPA Schedule 1 (Toxic Substances)
CANADA CEPA SCHED1
Listed
View →

Canada's CEPA list of toxic substances; a listing flags the substance as toxic and subject to federal risk-management controls.

{
  "source": "Canada CEPA Schedule 1 (Toxic Substances)",
  "cas_number": "91-20-3",
  "identifier": "91-20-3",
  "publication": "Canada Gazette Part II, Vol. 144, No. 10, May 12, 2010, SOR/2010-98 (https://www.gazette.gc.ca/rp-pr/p2/2010/2010-05-12/pdf/g2-14410.pdf); Canada Gazette Part III, Vol. 46, No. 1, October 27, 2023, Chapter 12 (https://canadagazette.gc.ca/rp-pr/p3/2023/g3-04601.pdf)",
  "identifier_2": "2 - 78",
  "chemical_name": "Naphthalene",
  "additional_information": "This substance is included in item 78 (Naphthalene, which has the molecular formula C10H8) on Part 2 of Schedule 1 of the Canadian Environmental Protection Act, 1999 (https://laws-lois.justice.gc.ca/eng/acts/c-15.31/) (CEPA), as set out in the recent publications(s) listed below and/or in: Canada Gazette Part I, Vol. 142, No. 27, July 5, 2008 (https://gazette.gc.ca/rp-pr/p1/2008/2008-07-05/pdf/g1-14227.pdf#page=103) and Screening Assessment for the Challenge: Naphthalene (https://www.canada.ca/en/environment-climate-change/services/evaluating-existing-substances/screening-assessment-forchallenge35.html). The addition of a substance on Schedule 1 enables the Minister of the Environment and the Minister of Health to implement risk management measures under CEPA to manage potential environmental and human health risks that the substance may pose.\n\nThis item might include other substances that have not been identified in this Substances Search list. If a substance is added to Schedule 1, there could be associated risk management measures. For further information, see Toxic substances list (https://www.canada.ca/en/environment-climate-change/services/canadian-environmental-protection-act-registry/substances-list/toxic.html)."
}
Canada Domestic Substances List
CANADA DSL
Listed
View →

Canada's inventory of substances already in commerce; a listing means it can be manufactured or imported without new-substance notification.

{
  "source": "Canada Domestic Substances List (DSL)",
  "cas_number": "91-20-3",
  "identifier": "91-20-3",
  "publication": "Canada Gazette Part II, Vol. 128, No. 9, May 4, 1994, SOR/94-311 (http://central.bac-lac.gc.ca/.redirect?app=cangaz&id=14339&lang=eng)",
  "identifier_2": "",
  "chemical_name": "Naphthalene",
  "additional_information": "This substance is on the Domestic Substances List (DSL). \n \nThis substance was added to the DSL as an “Existing Substance” given that it meets the criteria set out in the Canadian Environmental Protection Act, 1999 for substances that were in commerce in Canada between 1984 and 1986."
}
Canada National Pollutant Release Inventory (NPRI)
CANADA NPRI
Listed
View →

Canada's pollutant-release inventory; a listing means facilities must publicly report releases and transfers of the substance.

{
  "source": "Canada National Pollutant Release Inventory (NPRI)",
  "cas_number": "91-20-3",
  "identifier": "91-20-3",
  "publication": "https://www.canada.ca/en/environment-climate-change/services/national-pollutant-release-inventory/report/legal-requirements-gazette-notices.html - Notices with respect to substances in the National Pollutant Release Inventory (NPRI)",
  "identifier_2": "",
  "chemical_name": "Naphthalene",
  "additional_information": "NPRI Part (threshold category): 1A\nThreshold for reporting to NPRI: 10 tonnes manufactured, processed or otherwise used\nConcentration threshold: 1%\nThis substance has been reportable to the NPRI since: 1993\n\nFor more information, see the NPRI website (https://www.canada.ca/en/services/environment/pollution-waste-management/national-pollutant-release-inventory.html)."
}
AustraliaAustralia[AUSTRALIA]
Australia Safe Work GHS Classification (HCIS)
AU SWA GHS
Listed
View →

Australia's official workplace hazard classification; a listing assigns the substance harmonised GHS health and physical-hazard categories.

{
  "source": "Safe Work Australia HCIS (via PubChem GHS Classification)",
  "cas_number": "91-20-3",
  "pictograms": [],
  "pubchem_cid": "931",
  "signal_word": "Warning",
  "chemical_name": "N0004",
  "hazard_statements": [
    "H302: Harmful if swallowed [Warning Acute toxicity, oral]",
    "H335: May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]",
    "H351: Suspected of causing cancer [Warning Carcinogenicity]",
    "H410: Very toxic to aquatic life with long lasting effects [Warning Hazardous to the aquatic environment, long-term hazard]"
  ]
}
New ZealandNew Zealand[NEW ZEALAND]
Not ListedNot listed in any New Zealand framework on record.
FranceFrance[FRANCE]
Not ListedNot listed in any France framework on record.
SwitzerlandSwitzerland[SWITZERLAND]
Not ListedNot listed in any Switzerland framework on record.
NE-Atlantic[NE-ATLANTIC]
OSPAR List of Chemicals for Priority Action
OSPAR
Listed
View →

OSPAR's priority-action list; a listing means the substance is targeted for ending discharges to the North-East Atlantic.

{
  "notes": "OSPAR 2002; PAH",
  "cas_number": "91-20-3",
  "chemical_name": "Naphthalene"
}
JapanJapan[JAPAN]
Japan NITE GHS Classification
JP NITE GHS
Listed
View →

Japan's official GHS hazard classification (NITE); a listing assigns the substance harmonised GHS health and physical-hazard categories.

{
  "source": "Japan NITE-CMC (via PubChem GHS Classification)",
  "cas_number": "91-20-3",
  "pictograms": [],
  "pubchem_cid": "931",
  "signal_word": "Danger",
  "chemical_name": "N0004",
  "hazard_statements": [
    "H320: Causes eye irritation [Warning Serious eye damage/eye irritation]",
    "H400: Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]",
    "H411: Toxic to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard]",
    "H228: Flammable solid [Danger Flammable solids]",
    "H302: Harmful if swallowed [Warning Acute toxicity, oral]",
    "H317: May cause an allergic skin reaction [Warning Sensitization, Skin]",
    "H351: Suspected of causing cancer [Warning Carcinogenicity]",
    "H370: Causes damage to organs [Danger Specific target organ toxicity, single exposure]",
    "H372: Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]",
    "H316: Causes mild skin irritation [Warning Skin corrosion/irritation]",
    "H371: May cause damage to organs [Warning Specific target organ toxicity, single exposure]"
  ]
}

Data as of 2026-10-26·All sources and refresh dates

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