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Ammonium methacrylate
CASRN 16325-47-6
Contents
0516
Ammonium methacrylate; CASRN 16325-47-6
Health assessment information on a chemical substance is included in IRIS only
after a comprehensive review of chronic toxicity data by U.S. EPA health
scientists from several Program Offices and the Office of Research and
Development. The summaries presented in Sections I and II represent a
consensus reached in the review process. Background information and
explanations of the methods used to derive the values given in IRIS are
provided in the Background Documents.
STATUS OF DATA FOR Ammonium methacrylate
File On-Line 03/01/1991
Category (section) Status Last Revised
----------------------------------------- -------- ------------
Oral RfD Assessment (I.A.) no data
Inhalation RfC Assessment (I.B.) no data
Carcinogenicity Assessment (II.) on-line 03/01/1991
_I. CHRONIC HEALTH HAZARD ASSESSMENTS FOR NONCARCINOGENIC EFFECTS
__I.A. REFERENCE DOSE FOR CHRONIC ORAL EXPOSURE (RfD)
Substance Name -- Ammonium methacrylate
CASRN -- 16325-47-6
Not available at this time.
__I.B. REFERENCE CONCENTRATION FOR CHRONIC INHALATION EXPOSURE (RfC)
Substance Name -- Ammonium methacrylate
CASRN -- 16325-47-6
Not available at this time.
_II. CARCINOGENICITY ASSESSMENT FOR LIFETIME EXPOSURE
Substance Name -- Ammonium methacrylate
CASRN -- 16325-47-6
Last Revised -- 03/01/1991
Section II provides information on three aspects of the carcinogenic
assessment for the substance in question; the weight-of-evidence judgment of
the likelihood that the substance is a human carcinogen, and quantitative
estimates of risk from oral exposure and from inhalation exposure. The
quantitative risk estimates are presented in three ways. The slope factor is
the result of application of a low-dose extrapolation procedure and is
presented as the risk per (mg/kg)/day. The unit risk is the quantitative
estimate in terms of either risk per ug/L drinking water or risk per ug/cu.m
air breathed. The third form in which risk is presented is a drinking water
or air concentration providing cancer risks of 1 in 10,000, 1 in 100,000 or 1
in 1,000,000. The rationale and methods used to develop the carcinogenicity
information in IRIS are described in The Risk Assessment Guidelines of 1986
(EPA/600/8-87/045) and in the IRIS Background Document. IRIS summaries
developed since the publication of EPA's more recent Proposed Guidelines for
Carcinogen Risk Assessment also utilize those Guidelines where indicated
(Federal Register 61(79):17960-18011, April 23, 1996). Users are referred to
Section I of this IRIS file for information on long-term toxic effects other
than carcinogenicity.
__II.A. EVIDENCE FOR CLASSIFICATION AS TO HUMAN CARCINOGENICITY
___II.A.1. WEIGHT-OF-EVIDENCE CLASSIFICATION
Classification -- D; not classifiable as to human carcinogenicity
Basis -- No human data and no animal data.
___II.A.2. HUMAN CARCINOGENICITY DATA
None.
___II.A.3. ANIMAL CARCINOGENICITY DATA
None.
___II.A.4. SUPPORTING DATA FOR CARCINOGENICITY
Methacrylic acid, a dissociation product of ammonium methacrylate, was
positive in a DNA-cell binding assay (Kubinski et al., 1981), but was not
mutagenic in a reverse mutation assay using Salmonella typhimurium strains
TA98, TA100, TA1535 and TA1537 (Haworth et al., 1983).
__II.B. QUANTITATIVE ESTIMATE OF CARCINOGENIC RISK FROM ORAL EXPOSURE
None.
__II.C. QUANTITATIVE ESTIMATE OF CARCINOGENIC RISK FROM INHALATION EXPOSURE
None.
__II.D. EPA DOCUMENTATION, REVIEW, AND CONTACTS (CARCINOGENICITY ASSESSMENT)
___II.D.1. EPA DOCUMENTATION
Source Document -- This assessment is not presented in any existing U.S. EPA
document.
___II.D.2. REVIEW (CARCINOGENICITY ASSESSMENT)
Agency Work Group Review -- 11/07/1990
Verification Date -- 11/07/1990
___II.D.3. U.S. EPA CONTACTS (CARCINOGENICITY ASSESSMENT)
Please contact the Risk Information Hotline for all questions concerning this
assessment or IRIS, in general, at (513)569-7254 (phone), (513)569-7159 (FAX)
or RIH.IRIS@EPAMAIL.EPA.GOV (internet address).
_VI. BIBLIOGRAPHY
Substance Name -- Ammonium methacrylate
CASRN -- 16325-47-6
Last Revised -- 03/01/1991
__VI.A. ORAL RfD REFERENCES
None
__VI.B. INHALATION RfC REFERENCES
None
__VI.C. CARCINOGENICITY ASSESSMENT REFERENCES
Haworth, S., T. Lawlor, K. Mortelmans, W. Speck and E. Zeiger. 1983.
Salmonella mutagenicity test results for 250 chemicals. Environ. Mutagen.
Suppl. 1: 3-6, 12-13, 108.
Kubinski, H., G.E. Gutzke and Z.O. Kubinski. 1981. DNA-cell binding (DCB)
assay for suspected carcinogens and mutagens. Mutat. Res. 89: 95-136.
_VII. REVISION HISTORY
Substance Name -- Ammonium methacrylate
CASRN -- 16325-47-6
-------- -------- --------------------------------------------------------
Date Section Description
-------- -------- --------------------------------------------------------
03/01/1991 II. Carcinogenicity assessment on-line
03/01/1991 VI. Bibliography on-line
01/01/1992 IV. Regulatory Action section on-line
VIII. SYNONYMS
Substance Name -- Ammonium methacrylate
CASRN -- 16325-47-6
Last Revised -- 03/01/1991
16325-47-6
2-Propenoic acid, 2-methyl-, ammonium salt
Ammonium methacrylate
Ammonium 2-methyl-2-propenoate
Methacrylic acid, ammonium salt
2-Propenoic acid, 2-methyl-, ammonium salt
Last updated: 5 May 1998
URL: http://www.epa.gov/iris/SUBST/0516.HTM
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