Substance profile
Captan
Captan is a white to cream powder and is odorless.
01 · Identification
What Captan is
Captan is a white to cream powder and is odorless. Its molecular formula is C9H8Cl3NO2S and its molecular weight is 300.6 g/mol. It melts at 173 °C.
Under the GHS it carries the signal word Danger. It is classed as hazardous Air Pollutants (HAPs).
02 · Identifiers
Captan identifiers and molecular data
Captan CAS number and EC number
Captan molecular formula and molecular weight
Other names for Captan
- captan (ISO)
- 1,2,3,6-tetrahydro-N-(trichloromethylthio)phthalimide
03 · GHS classification
Captan hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Captan pictograms and signal word
Captan hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Acute toxicity - inhalation GHS chapter 3.1 | Category 3 | H331 | GHS06 |
| Serious eye damage/eye irritation GHS chapter 3.3 | Category 1 | H318 | GHS05 |
| Skin sensitisation GHS chapter 3.4 | Category 1 or 1A or 1B | H317 | GHS07 |
| Carcinogenicity GHS chapter 3.6 | Category 2 | H351 | GHS08 |
| Hazardous to the aquatic environment - acute GHS chapter 4.1 | Category 1 | H400 | GHS09 |
Where two values are shown with “or”, the hazard statement is shared by more than one category or by more than one class, and the code alone does not say which. H272, for example, belongs to oxidising liquids and to oxidising solids — the physical state decides. The binding answer for a specific entry is in the CLP Annex VI table itself.
Captan hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H351 | Suspected of causing cancer <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H331 | Toxic if inhaled. |
| H318 | Causes serious eye damage. |
| H317 | May cause an allergic skin reaction. |
| H400 | Very toxic to aquatic life. |
This page lists only the codes assigned to Captan. The full reference lives on the hazard statements hub, the precautionary statements hub and the GHS pictograms hub.
Safety Data Sheet
Getting an SDS for Captan
A Safety Data Sheet is written for a product, not for a substance: the supplier of the grade you actually buy issues it, so two suppliers of Captan issue two different sheets. That is why there is no single authoritative SDS for a substance to download — what there is, is the job of collecting the sheets for the products you hold and keeping them current as suppliers revise them.
04 · Precautionary statements
Captan precautionary statements
CLP Annex VI assigns 16 precautionary statements to Captan. They are grouped the way a label groups them: what to do before handling, what to do when something has already happened, how to store it and how to dispose of it.
Prevention
What to do before and during handling so the hazard never happens.
Response
What to do once exposure, spillage or fire has already happened.
Disposal
What has to happen to the contents and the empty container.
Reading the notation. … is a blank the supplier fills in — not a truncated sentence.· [square brackets] mark a part printed only when it applies.
05 · Names in the regulation
Captan name in 23 EU languages
CLP Annex VI Part 3 is published in every language edition of the regulation, and the identification column is written out in each of them. Nothing below is translated by us: each line is the name as that edition prints it. Under Art. 18(2) the substance name from Annex VI is a lawful product identifier, so this is the wording to put on a label going to that market — and where the cell lists several designations, any one of them qualifies.
| Language | Name in CLP Annex VI Part 3 |
|---|---|
| Bulgarian български | каптан (ISO) N -(трихлорометилтио)-1,2,3,6-тетрахидрофталимид |
| Spanish español | Captán (ISO) 1,2,3,6-tetrahidro- N -(triclorometiltio)ftalimida |
| Czech čeština | kaptan (ISO) 1,2,3,6-tetrahydro- N -(trichloromethylthio)ftalimid |
| Danish dansk | captan (ISO) 1,2,3,6-tetrahydro- N -(trichlormethylthio)phthalimid |
| German Deutsch | Captan (ISO) 1,2,3,6-Tetrahydro- N -(trichlormethylthio)phthalimid |
| Estonian eesti | kaptaan (ISO) 1,2,3,6-tetrahüdro- N -(triklorometüültio)ftaalimiid |
| Greek ελληνικά | captan (καπτάνη) (ISO) 1,2,3,6-τετραϋδρο- N -(τριχλωρομεθυλοθειο)φθαλιμίδιο |
| English English | captan (ISO) 1,2,3,6-tetrahydro- N -(trichloromethylthio)phthalimide |
| French français | captane (ISO) 1,2,3,6-tétrahydro- N -(trichlorométhylthio)phthalimide |
| Croatian hrvatski | kaptan (ISO) 1,2,3,6-tetrahidro- N -(triklormetiltio)ftalimid |
| Italian italiano | captano (ISO) 1,2,3,6-tetraidro- N -(triclorometiltio)ftalimmide |
| Latvian latviešu | kaptāns (ISO) 1,2,3,6-tetrahidro- N -(trihlormetiltio)ftalimīds |
| Lithuanian lietuvių | kaptanas (ISO) 1,2,3,6-tetrahidro- N -(trichlormetiltio)ftalimidas |
| Hungarian magyar | kaptán (ISO) 1,2,3,6-tetrahidro- N -(triklórmetiltio)ftálimid |
| Maltese Malti | kaptan (ISO) 1,2,3,6-tetraidro- N -(triklorometiltijo)ftalimmid |
| Dutch Nederlands | captan (ISO) 1,2,3,6-tetrahydro- N -(trichloormethylthio)ftaalimide |
| Polish polski | kaptan (ISO) N-(trichlorometylosulfanylo)-cykloheks-4-eno-1,2-dikarboksyimidN -(trichlorometylosulfanylo)-1,2,3,6-tetrahydroftalimid |
| Portuguese português | captana (ISO) 1,2,3,6-tetra-hidro- N -(triclorometiltio)ftalimida |
| Romanian română | captan (ISO) 1,2,3,6-tetrahidro- N -(triclorometiltio)ftalimidă |
| Slovak slovenčina | kaptán (ISO) N -(trichlórmetylsulfanyl)-1,2,3,6-tetrahydroftalimid |
| Slovenian slovenščina | kaptan (ISO) 1,2,3,6-tetrahidro- N -(triklorometiltio)ftalimid |
| Finnish suomi | kaptaani (ISO) 1,2,3,6-tetrahydro- N -(trikloorimetyylitio)ftaali-imidi |
| Swedish svenska | kaptan (ISO) 1,2,3,6-tetrahydro- N -(triklormetyltio)ftalimid |
All 23 language editions of Annex VI carry this entry. Irish is the twenty-fourth official EU language and has no line here for a different reason: no consolidated CLP text has ever been published in Irish, so there is no Irish edition of Annex VI to quote a name from. Source: consolidated CLP, CELEX 02008R1272, language editions. © European Union, https://eur-lex.europa.eu — only the electronic Official Journal of the European Union is authentic.
06 · Label elements
Captan GHS label elements
Everything CLP Annex VI fixes for Captan, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Captan
- Suspected of causing cancer <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>.
- Toxic if inhaled.
- Causes serious eye damage.
- May cause an allergic skin reaction.
- Very toxic to aquatic life.
- Obtain special instructions before use.
- Do not breathe dust/fume/gas/mist/vapours/spray.
- Avoid breathing dust/fume/gas/mist/vapours/spray.
- Use only outdoors or in a well-ventilated area.
- Contaminated work clothing should not be allowed out of the workplace.
- Avoid release to the environment.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF INHALED:
- IF IN EYES:
- IF exposed or concerned:
- Immediately call a POISON CENTER/doctor/…
- Get medical advice/attention.
- If skin irritation or rash occurs:
- Remove contact lenses, if present and easy to do. Continue rinsing.
- Collect spillage.
- Dispose of contents/container to …
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Captan in the GHS label constructor →
07 · Health hazards
Captan health hazards and exposure limits
Captan hazard summary
Captan is a fungicide used on fruits, vegetables, and ornamentals. Acute (short-term) dermal exposure to captan may cause dermatitis and conjunctivitis in humans. Ingestion of large quantities of captan may cause vomiting and diarrhea in humans. Captan was found to be carcinogenic in one strain of mice exposed in their diet, causing tumors of the duodenum. In mice exposed by either gavage (experimentally placing the chemical in the stomach) or injection, an increased incidence of tumors was not observed. EPA has classified captan as a Group B2, probable human carcinogen.
Source: EPA Hazardous Air Pollutants
Captan carcinogenicity classification
Studied by the US National Toxicology Program: TR-015: Bioassay of Captan for Possible Carcinogenicity (CASRN 133-06-2) (1977 )
Classification of carcinogenicity: 1) evidence in humans: no adequate data; 2) evidence in animals: limited evidence. Overall summary evaluation of carcinogenic risk to humans is Group 3: The agent is not classifiable as to its carcinogenicity to humans. /From table/
Source: Hazardous Substances Data Bank (HSDB)
An IARC group and a CLP classification answer different questions. IARC judges whether the evidence for cancer in humans is strong enough; CLP Annex VI is the legally binding EU classification. A substance can carry one and not the other.
Captan occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| PEL | none See Appendix G | The National Institute for Occupational Safety and Health (NIOSH) |
| REL | 5 mg/m³ | Occupational Safety and Health Administration (OSHA) |
| REL | Ca TWA 5 mg/m3 See Appendix A | The National Institute for Occupational Safety and Health (NIOSH) |
| IDLH | A potential occupational carcinogen. (NIOSH, 2024) | CAMEO Chemicals |
| IDLH | NIOSH considers captan to be a potential occupational carcinogen. | Hazardous Substances Data Bank (HSDB) |
| IDLH | Ca [N.D.] | The National Institute for Occupational Safety and Health (NIOSH) |
These are United States values. The European Union sets its own indicative and binding limits, and the figure that applies at a given workplace is the one in the local regulation — not the one shown here.
08 · Physical and chemical properties
Captan properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
Captan boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | Decomposes | decomposes | NIOSH |
| Decomposes (NTP, 1992) | decomposes | CAMEO | |
| decomposes | decomposes | OSHA |
Captan melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 172.5 °C (342.5 °F) | HSDB | |
| 177.78 °C (352 °F) | CAMEO |
Captan density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 1.74 g/cm³ | NIOSH | |
| 1.74 g/cm³ | at 20 °C | CAMEO | |
| 1.74 g/cm³ | at 25 °C | HSDB |
Captan solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | In water, 5.1 mg/L at 25 °C | at 25 °C | HSDB |
| 20 g/kg xylene; 21 g/kg acetone; 1.7 g/kg isopropanol; 23 g/kg cyclohexanone at 26 °C | at 26 °C | HSDB |
Captan vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 0 mmHg | approx | NIOSH |
| 9e-8 mmHg | at 25 °C | HSDB |
Captan lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | Combustible Solid; may be dissolved in flammable liquids. | NIOSH |
Captan corrosivity
| Property | Value | Conditions | Source |
|---|---|---|---|
| Corrosivity | Noncorrosive | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
Captan fire and explosion behaviour
These are descriptions rather than measured values, so they are kept out of the table above and quoted here with the source that reported them.
Captan fire potential
Captan may burn, but does not ignite readily.
Source: Hazardous Substances Data Bank (HSDB)
Solubility
7.78 g/100 mL chloroform; 8.15 g/100 mL tetrachloroethane; 4.96 g/100 mL cyclohexanone; 4.70 g/100 mL dioxane; 2.13 g/100 mL benzene; 0.69 g/100 mL toluene; 0.04 g/100 mL heptane; 0.29 g/100 mL ethanol; 0.25 g/100 mL ether at 26 °C
Source: HSDB
10 · Handling and storage
Captan storage and handling
Captan safe storage
Provision to contain effluent from fire extinguishing. Separated from food and feedstuffs. Store in an area without drain or sewer access.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Captan storage conditions
Keep container tightly closed in a dry and well-ventilated place. Storage class (TRGS 510): Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects.
Source: Hazardous Substances Data Bank (HSDB)
Captan incompatible materials
Incompatible materials: Strong bases
Source: Hazardous Substances Data Bank (HSDB)
Captan reactivity
CAPTAN decomposes at or near the melting point. This chemical is incompatible with strong alkaline and oxidizing materials, sulfur and (sulfur + moisture). (NTP, 1992)
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Captan in the storage compatibility matrix →
11 · Questions
Captan — frequently asked questions
What is the CAS number of Captan?
The CAS number of Captan is 133-06-2. Its EC number is 205-087-0.
What is the chemical formula of Captan?
The molecular formula of Captan is C9H8Cl3NO2S and its molecular weight is 300.6 g/mol.
What does a Captan label have to show?
Under CLP Annex VI the label for Captan carries the pictograms Skull and crossbones, Corrosion, Health hazard and Environment and the signal word is Danger.
Is Captan flammable?
CLP Annex VI assigns Captan no flammability hazard class. That is not a statement that it cannot burn: the harmonised list only records the hazards that were assessed for it.
Is Captan a carcinogen?
CLP Annex VI assigns Captan H351 — suspected of causing cancer. That is category 2: the evidence points that way but is not conclusive. IARC places it in Group 3: not classifiable as to its carcinogenicity to humans.
What is the exposure limit for Captan?
The US occupational exposure limit reported for Captan is none See Appendix G (The National Institute for Occupational Safety and Health (NIOSH)). Limits differ by country: the EU sets its own indicative and binding values, and the figure that applies at a given workplace is the one in the local regulation.
What is the boiling point of Captan?
The boiling point reported for Captan is Decomposes, decomposes (NIOSH).
What is the melting point of Captan?
The melting point reported for Captan is 172.5 °C (342.5 °F) (HSDB).
How should Captan be stored?
Keep container tightly closed in a dry and well-ventilated place. Storage class (TRGS 510): Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects. (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to Captan
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