Dieldrin

MedEd Pesticide lists Dieldrin as an insecticide in the organochlorine class.

MedEd Pesticide Summarizes Dieldrin at a Glance

Type

Insecticide

Chemical class

Organochlorine

CAS number

60-57-1

Formula

C12H8Cl6O

Molar mass

380.9 g/mol

EU status

Not approved as an active substance in the EU.

US status

Not registered with EPA. All 46 products that contained Dieldrin are cancelled.

MedEd Pesticide Summarizes Dieldrin’s Toxicity Records

MedEd Pesticide holds 118 toxicity records for Dieldrin, from 6 sources. The headline values are below.

Oral LD50 in ratsAcute, swallowed

Lowest reported 38.3 mg/kg, median 38.3 mg/kg, from 1 record.

Dermal LD50Acute, skin contact

Lowest reported 56 mg/kg, median 153 mg/kg, from 2 records.

Lowest NOAELLong term, mammals

0.005 mg/kg-day in dog, 2 years. Source: EFSA.

See all 118 Dieldrin toxicity records in the explorer. The records come from EPA’s Toxicity Values Database, and the methodology explains their limits.

MedEd Pesticide Reports Dieldrin’s EU Safety Reference Values

MedEd Pesticide takes these values from the EU, which sets them when it assesses an active substance. They are expressed per kilogram of body weight.

ARfDAcute reference dose

0.003 mg/kg bwThe amount that can be taken in over a short period, such as one meal or one day, without appreciable health risk.

MedEd Pesticide Lists Dieldrin’s EU Hazard Classification

MedEd Pesticide lists the harmonised EU hazard statements for Dieldrin below.

• H310 Fatal in contact with skin
• H301 Toxic if swallowed
• H400 Very toxic to aquatic life
• H410 Very toxic to aquatic life with long-lasting effects
• H351 Suspected of causing cancer
• H372 Causes damage to organs through prolonged or repeated exposure

MedEd Pesticide takes EU status, reference values and hazard classification from the EU Pesticides Database. MedEd Pesticide takes US status from EPA’s Pesticide Product Information System (dated 2026-10-13) and chemical identity from PubChem. Retrieved 2026-10-16. Values and approvals change, so check the source for the current entry. See the methodology and the glossary, or compare Dieldrin with another pesticide.

MedEd Pesticide. (2026). Dieldrin. https://mededpesticide.org/pesticides/dieldrin/ (accessed Month Day, Year)