Integrated Risk Information System

Reference Dose for Chronic Oral Exposure (RfD) Reference Concentration for Chronic Inhalation Exposure (RfC) Carcinogenicity Assessment for Lifetime Exposure Bibliography Revision History Synonyms

0026

Chlorpyrifos; CASRN 2921-88-2

STATUS OF DATA FOR Chlorpyrifos

File First On-Line 01/31/1987

Category (section)	Status	Last Revised
Oral RfD Assessment (I.A.)	message	03/24/2011
Inhalation RfC Assessment (I.B.)	message
Carcinogenicity Assessment (II.)	message

_I.  Chronic Health Hazard Assessments for Noncarcinogenic Effects

_I.A. Reference Dose for Chronic Oral Exposure (RfD)

Substance Name — Chlorpyrifos
CASRN — 2921-88-2
Last Revised — 03/24/2011

Not available at this time.

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_I.B. Reference Concentration for Chronic Inhalation Exposure (RfC)

Substance Name — Chlorpyrifos
CASRN — 2921-88-2

Not available at this time.

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_II. Carcinogenicity Assessment for Lifetime Exposure

Substance Name — Chlorpyrifos
CASRN — 2921-88-2

This substance/agent has not undergone a complete evaluation and determination under US EPA's IRIS program for evidence of human carcinogenic potential.

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_III. [reserved]
_IV. [reserved]
_V. [reserved]

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_VI. Bibliography

None.

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_VII.  Revision History

Substance Name — Chlorpyrifos
CASRN — 2921-88-2

Date	Section	Description
03/01/1988	I.A.5.	Core grades added
11/01/1989	VI.	Bibliography on-line
01/01/1992	IV.	Regulatory actions updated
04/01/1997	III., IV., V.	Drinking Water Health Advisories, EPA Regulatory Actions, and Supplementary Data were removed from IRIS on or before April 1997. IRIS users were directed to the appropriate EPA Program Offices for this information.
02/22/2001	I.A., II.	This chemical is being reassessed under the IRIS Program.
02/09/2004	I.A., II.	This chemical is no longer being reassessed under the IRIS Program. See Federal Register February 9, 2004 (Volume 69, Number 26).
03/24/2011	I.A.	The RfD for this chemical was removed.

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_VIII. Synonyms

Substance Name — Chlorpyrifos
CASRN — 2921-88-2
Last Revised — 01/31/1987

• 2921-88-2
• BRODAN
• Chlorpyrifos
• CHLORPYRIFOS-ETHYL
• DETMOL U.A.
• DOWCO 179
• DURSBAN
• DURSBAN F
• ENT 27311
• ERADEX
• ETHION, dry
• LORSBAN
• NA 2783
• OMS-0971
• O,O-DIAETHYL-O-3,5,6-TRICHLOR-2-PYRIDYLMONOTHIOPHOSPHAT
• O,O-DIETHYL O-3,5,6-TRICHLORO-2-PYRIDYL PHOSPHOROTHIOATE
• PHOSPHOROTHIOIC ACID, O,O-DIETHYL O-(3,5,6-TRICHLORO-2-PYRIDYL)ESTER
• PYRINEX

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