Substance profile
Dieldrin
Dieldrin is colorless crystals with a mild, chemical odor.
01 · Identification
What Dieldrin is
Dieldrin is colorless crystals with a mild, chemical odor. Its molecular formula is C12H8Cl6O and its molecular weight is 380.9 g/mol. It melts at 176 °C, is soluble in water.
Under the GHS it carries the signal word Danger. It is classed as carcinogens.
02 · Identifiers
Dieldrin identifiers and molecular data
Dieldrin CAS number and EC number
Dieldrin molecular formula and molecular weight
Other names for Dieldrin
- dieldrin (ISO)
03 · GHS classification
Dieldrin hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Dieldrin pictograms and signal word
Dieldrin hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Acute toxicity - oral GHS chapter 3.1 | Category 3 | H301 | GHS06 |
| Acute toxicity - dermal GHS chapter 3.1 | Category 1 or 2 | H310 | GHS06 |
| Carcinogenicity GHS chapter 3.6 | Category 2 | H351 | GHS08 |
| Specific target organ toxicity - repeated exposure GHS chapter 3.9 | Category 1 | H372 | GHS08 |
| Hazardous to the aquatic environment - acute GHS chapter 4.1 | Category 1 | H400 | GHS09 |
| Hazardous to the aquatic environment - chronic GHS chapter 4.1 | Category 1 | H410 | 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.
Dieldrin 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>. |
| H310 | Fatal in contact with skin. |
| H301 | Toxic if swallowed. |
| H372 | Causes damage to organs <or state all organs affected, if known> through prolonged or repeated exposure <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
This page lists only the codes assigned to Dieldrin. 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 Dieldrin
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 Dieldrin 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
Dieldrin precautionary statements
CLP Annex VI assigns 15 precautionary statements to Dieldrin. 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
Dieldrin 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 | диелдрин (ISO) |
| Spanish español | Dieldrina (ISO) |
| Czech čeština | dieldrin (ISO) |
| Danish dansk | dieldrin (ISO) |
| German Deutsch | Dieldrin (ISO) |
| Estonian eesti | dieldriin (ISO) |
| Greek ελληνικά | dieldrin (διελδρίνη) (ISO) |
| English English | dieldrin (ISO) |
| French français | dieldrine (ISO) |
| Croatian hrvatski | dieldrin (ISO) |
| Italian italiano | dieldrin (ISO) |
| Latvian latviešu | dieldrīns (ISO) |
| Lithuanian lietuvių | dieldrinas (ISO) |
| Hungarian magyar | dieldrin (ISO) |
| Maltese Malti | dieldrin (ISO) |
| Dutch Nederlands | dieldrin (ISO) |
| Polish polski | dieldryna (ISO) |
| Portuguese português | dieldrina (ISO) |
| Romanian română | dieldrin (ISO) |
| Slovak slovenčina | dieldrín (ISO) |
| Slovenian slovenščina | dieldrin (ISO) |
| Finnish suomi | dieldriini (ISO) |
| Swedish svenska | dieldrin (ISO) |
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
Dieldrin GHS label elements
Everything CLP Annex VI fixes for Dieldrin, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Dieldrin
- Suspected of causing cancer <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>.
- Fatal in contact with skin.
- Toxic if swallowed.
- Causes damage to organs <or state all organs affected, if known> through prolonged or repeated exposure <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>.
- Very toxic to aquatic life.
- Very toxic to aquatic life with long lasting effects.
- Obtain special instructions before use.
- Do not breathe dust/fume/gas/mist/vapours/spray.
- Do not eat, drink or smoke when using this product.
- Avoid release to the environment.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF SWALLOWED:
- IF ON SKIN:
- IF exposed or concerned:
- Immediately call a POISON CENTER/doctor/…
- Get medical advice/attention.
- Get medical advice/attention if you feel unwell.
- Rinse mouth.
- Wash with plenty of water/…
- Collect spillage.
- Dispose of contents/container to …
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Dieldrin in the GHS label constructor →
07 · Health hazards
Dieldrin health hazards and exposure limits
Dieldrin carcinogenicity classification
Studied by the US National Toxicology Program: TR-022: Bioassay of Dieldrin for Possible Carcinogenicity (CASRN 60-57-1) (1978 )
Cancer Classification: Group B2 Probable Human Carcinogen
Source: Hazardous Substances Data Bank (HSDB)
CLASSIFICATION: B2; probable human carcinogen. BASIS FOR CLASSIFICATION: Dieldrin is carcinogenic in seven strains of mice when administered orally. Dieldrin is structurally related to compounds (aldrin, chlordane, heptachlor, heptachlor epoxide, and chlorendic acid) which produce tumors in rodents. HUMAN CARCINOGENICITY DATA: Inadequate. ANIMAL CARCINOGENICITY DATA: Sufficient.
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.
Dieldrin occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| PEL | 0.25 [mg/m3] | Haz-Map, Information on Hazardous Chemicals and Occupational Diseases |
| PEL | TWA 0.25 mg/m3 [skin] | The National Institute for Occupational Safety and Health (NIOSH) |
| REL | Ca TWA 0.25 mg/m3 [skin] See Appendix A | The National Institute for Occupational Safety and Health (NIOSH) |
| IDLH | 50 mg/m3 ; A potential occupational carcinogen. (NIOSH, 2024) | CAMEO Chemicals |
| IDLH | 50.0 [mg/m3] | Haz-Map, Information on Hazardous Chemicals and Occupational Diseases |
| IDLH | 50 mg/cu m; NIOSH has recommended that dieldrin be treated as a potential human carcinogen. | Hazardous Substances Data Bank (HSDB) |
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
Dieldrin 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.
Dieldrin boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | Decomposes | decomposes | NIOSH |
| Decomposes (NIOSH, 2024) | decomposes | CAMEO |
Dieldrin melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 175.5 °C (347.9 °F) | HSDB | |
| 176.11 °C (349 °F) | NIOSH |
Dieldrin density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 1.75 g/cm³ | HSDB | |
| 1.75 g/cm³ | at 20 °C | CAMEO |
Dieldrin solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | SLIGHTLY SOL IN MINERAL OILS, MODERATELY SOL IN ACETONE | HSDB | |
| Soluble in aromatic solvents; moderately soluble in acetone | HSDB | ||
| Insol in methanol, aliphatic hydrocarbons; soluble in benzene | HSDB |
Dieldrin vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 0.0000031 mmHg | at 20 °C | HSDB |
| 0.00000589 mmHg | at 25 °C | HSDB | |
| 8e-7 mmHg | at 25 °C | NIOSH |
Dieldrin lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | Noncombustible Solid | NIOSH |
Dieldrin vapor density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor density | 13.2 (air = 1) | HSDB |
Dieldrin odor threshold
| Property | Value | Conditions | Source |
|---|---|---|---|
| Odor threshold | 0.041 ppm | HSDB |
Dieldrin corrosivity
| Property | Value | Conditions | Source |
|---|---|---|---|
| Corrosivity | Slightly corrosive to metals | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
Dieldrin 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.
Dieldrin fire potential
Not flammable
Source: Hazardous Substances Data Bank (HSDB)
10 · Handling and storage
Dieldrin storage and handling
Dieldrin safe storage
Provision to contain effluent from fire extinguishing. Separated from food and feedstuffs and incompatible materials. See Chemical Dangers. Well closed. Keep in a well-ventilated room. Store in an area without drain or sewer access.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Dieldrin storage conditions
Storage temp: ambient; venting: open (flame arrester) (for liquid form)
Source: Hazardous Substances Data Bank (HSDB)
Dieldrin incompatible materials
Strong oxidizers, active metals such as sodium, strong acids, phenols.
Source: Hazardous Substances Data Bank (HSDB)
Dieldrin reactivity
DIELDRIN is sensitive to mineral acids, acid catalysts, acid oxidizing agents and active metals. It reacts with phenols. This compound is also slightly corrosive to metals. It may react vigorously with strong oxidizers such as chlorine and permanganates and strong acids such as sulfuric or nitric. (NTP, 1992)
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Dieldrin in the storage compatibility matrix →
11 · Questions
Dieldrin — frequently asked questions
What is the CAS number of Dieldrin?
The CAS number of Dieldrin is 60-57-1. Its EC number is 200-484-5.
What is the chemical formula of Dieldrin?
The molecular formula of Dieldrin is C12H8Cl6O and its molecular weight is 380.9 g/mol.
What does a Dieldrin label have to show?
Under CLP Annex VI the label for Dieldrin carries the pictograms Skull and crossbones, Health hazard and Environment and the signal word is Danger.
Is Dieldrin flammable?
CLP Annex VI assigns Dieldrin 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 Dieldrin a carcinogen?
CLP Annex VI assigns Dieldrin H351 — suspected of causing cancer. That is category 2: the evidence points that way but is not conclusive.
What is the exposure limit for Dieldrin?
The US occupational exposure limit reported for Dieldrin is 0.25 [mg/m3] (Haz-Map, Information on Hazardous Chemicals and Occupational Diseases). 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 Dieldrin?
The boiling point reported for Dieldrin is Decomposes, decomposes (NIOSH).
What is the melting point of Dieldrin?
The melting point reported for Dieldrin is 175.5 °C (347.9 °F) (HSDB).
How should Dieldrin be stored?
Storage temp: ambient; venting: open (flame arrester) (for liquid form) (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to Dieldrin
Keep going: substances starting with D, or search the whole database by name, CAS number, pictogram or signal word.