Alar (CASRN 1596-84-5)
view QuickView
0287
Alar;
CASRN 1596-84-5
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 Alar
File First On-Line 06/30/1988
Category (section) |
Status |
Last Revised |
---|---|---|
Oral RfD Assessment (I.A.) | on-line | 07/01/1991 |
Inhalation RfC Assessment (I.B.) | no data | 02/01/1991 |
Carcinogenicity Assessment (II.) | no data |
_I. Chronic Health Hazard Assessments for Noncarcinogenic Effects
_I.A. Reference Dose for Chronic Oral Exposure (RfD)
Substance Name — Alar
CASRN — 1596-84-5
Primary Synonym — Daminozide
Last Revised — 07/01/1991
The oral Reference Dose (RfD) is based on the assumption that thresholds
exist for certain toxic effects such as cellular necrosis. It is expressed
in units of mg/kg-day. In general, the RfD is an estimate (with uncertainty
spanning perhaps an order of magnitude) of a daily exposure to the human
population (including sensitive subgroups) that is likely to be without
an appreciable risk of deleterious effects during a lifetime. Please refer
to the Background Document for an elaboration of these concepts. RfDs
can also be derived for the noncarcinogenic health effects of substances
that are also carcinogens. Therefore, it is essential to refer to other
sources of information concerning the carcinogenicity of this substance.
If the U.S. EPA has evaluated this substance for potential human carcinogenicity,
a summary of that evaluation will be contained in Section II of this file.
__I.A.1. Oral RfD Summary
Critical Effect |
Experimental Doses* |
UF |
MF |
RfD |
---|---|---|---|---|
No adverse effects 3-Generation Uniroyal Chemical, 1966 |
NOEL: 300 ppm (15 LEL: none |
100
|
1
|
1.5E-1
mg/kg/day |
*Conversion Factors -- 1 ppm = 0.05 mg/kg/day (assumed rat food consumption)
__I.A.2. Principal and Supporting Studies (Oral RfD)
Uniroyal Chemical. 1966. MRID No. 0009413. Available from EPA. Write to FOI, EPA, Washington, DC 20460.
Three-generation reproduction and lactation studies were conducted with rats from the 2 year feeding study and a control group. When the rats were approximately 100 days of age, 20 pairs of males and females were separated from the 300 ppm (15 mg/kg/day) dosage group. Fertility, gestation, viability, lactation, and litter body weights were similar thru two cycles of each generation. There was no evidence of adverse effects by any criteria of performance at 300 ppm (15 mg/kg/day).
__I.A.3. Uncertainty and Modifying Factors (Oral RfD)
UF — An uncertainty factor of 100 was used to account for the intra- and interspecies differences.
MF — None
__I.A.4. Additional Studies/Comments (Oral RfD)
A 2-generation reproduction study (Uniroyal Chemical Co., 1987) is currently under review.
Data Considered for Establishing the RfD:
1) 3-Generation Reproduction - rat: Principal study - see previous description; no core grade
2) 2-Year Feeding (oncogenic) - rat: Systemic NOEL=3000 ppm (150 mg/kg/day) (HDT); no core grade (Uniroyal Chemical, 1966)
3) 2-Year Feeding - dog: NOEL=3000 ppm (75 mg/kg/day) (HDT); no core grade (U.S. Rubber Co., 1966)
4) 2-Year Feeding (oncogenic) - rat: Systemic NOEL=10,000 ppm (500 mg/kg/day) (HDT); (LDT; adenocarcinomas of the endomethrium and leiomyosarcomas of the uterus in females); no core grade (NCI, 1978)
5) Teratology - rat: Developmental NOEL=390 mg/kg/day; Developmental LEL=1800 mg/kg/day (HDT; fetotoxic skeletal malformations); core grade supplementary (Uniroyal Chemical, 1978)
Other Data Reviewed:
1) 2-Year Feeding (oncogenic) - mouse: Systemic NOEL=5000 ppm (750 mg/kg/day); Systemic LEL=10,000 ppm (1500 mg/kg/day) (decreased body weight and survival in females); no core grade (NCI, 1978)
2) 90-Day Feeding - rat: NOEL=2160 mg/kg/day (HDT); no core grade (Uniroyal Chemical, 1964)
3) 2-Year Feeding (oncogenic) - rat: NOEL=10,000 ppm (500 mg/kg/day) (HDT); core grade supplementary (Uniroyal Chemical Co., 1986a)
4) 2-Year Feeding (oncogenic) - mouse: Erthrocyte count, hemoglobin level and hematocrit are somewhat lower in males of 10,000 ppm level (HDT); no core grade (Uniroyal Chemical Co., 1986b)
Data Gap(s): Rat Teratology Study; Rabbit Teratology Study
__I.A.5. Confidence in the Oral RfD
Study — Low
Database — Medium
RfD — Low
The critical study is given a low confidence rating. Because of the extensive but questionable quality of the database, the submission of a new reproduction study and the pending submission of new chronic rat and mouse studies, the database is given a medium confidence rating. Therefore, confidence in the RfD can be considered low to medium.
__I.A.6. EPA Documentation and Review of the Oral RfD
Source Document — This assessment is not presented in any existing U.S. EPA document.
Other EPA Documentation — Pesticide Registration Files
Agency Work Group Review — 09/16/1987
Verification Date — 09/16/1987
Screening-Level Literature Review Findings — A screening-level review conducted by an EPA contractor of the more recent toxicology literature pertinent to the RfD for alar conducted in August 2003 identified one or more significant new studies. IRIS users may request the references for those studies from the IRIS Hotline at hotline.iris@epa.gov or 202-566-1676.
__I.A.7. EPA Contacts (Oral RfD)
Please contact the IRIS Hotline for all questions concerning this assessment or IRIS, in general, at (202)566-1676 (phone), (202)566-1749 (FAX) or hotline.iris@epa.gov (internet address).
_I.B. Reference Concentration for Chronic Inhalation Exposure (RfC)
Substance Name — Alar
CASRN — 1596-84-5
Primary Synonym — Daminozide
Not available at this time.
_II. Carcinogenicity Assessment for Lifetime Exposure
Substance Name — Alar
CASRN — 1596-84-5
Primary Synonym — Daminozide
Not available at this time.
_III.
[reserved]
_IV. [reserved]
_V. [reserved]
_VI. Bibliography
Substance Name — Alar
CASRN — 1596-84-5
Primary Synonym — Daminozide
Last Revised — 07/01/1991
_VI.A. Oral RfD References
NCI (National Cancer Institute). 1978. Bioassay of Daminozide for Possible Carcinogenicity. NCI Carcinogenesis Technical Report Series No. 83. DHEW Publication No. (NIH) 78-1333.
Uniroyal Chemical. 1964. MRID No. 00009727. Available from EPA. Write to FOI, EPA, Washington, DC 20460.
Uniroyal Chemical. 1966. MRID No. 0009413. Available from EPA. Write to FOI, EPA, Washington, DC 20460.
Uniroyal Chemical Company. 1978. MRID No. 00053764. Available from EPA. Write to FOI, EPA, Washington, DC 20460.
Uniroyal Chemical Company. 1986a. MRID No. 00016266. Available from EPA. Write to FOI, EPA, Washington, DC 20460.
Uniroyal Chemical Company. 1986b. MRID No. 40093501k, 40451001. Available from EPA. Write to FOI, EPA, Washington, DC 20460.
Uniroyal Chemical Company. 1987. MRID No. 40233901. Available from EPA. Write to FOI, EPA, Washington, DC 20460.
United States Rubber Company. 1966. MRID No. 00094113. Available from EPA. Write to FOI, EPA, Washington, DC 20460.
_VI.B. Inhalation RfD References
None
_VI.C. Carcinogenicity Assessment References
None
_VII. Revision History
Substance Name — Alar
CASRN — 1596-84-5
Primary Synonym — Daminozide
Date |
Section |
Description |
---|---|---|
08/22/1988 | I.A.4. | Study 4) text revised |
02/01/1991 | I.B. | Incorrect message removed |
07/01/1991 | I.A. | Principal study clarified |
07/01/1991 | I.A.4. | Citations clarified |
07/01/1991 | VI. | Bibliography on-line |
01/01/1992 | IV. | Regulatory Action section on-line |
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. |
10/28/2003 | I.A.6. | Screening-Level Literature Review Findings message has been added. |
_VIII. Synonyms
Substance Name — Alar
CASRN — 1596-84-5
Primary Synonym — Daminozide
Last Revised — 06/30/1988
- 1596-84-5
- Alar
- ALAR-85
- AMINOZIDE
- B-9
- B 995
- BERNSTEINSAEURE-2,2-DIMETHYLHYDRAZID
- B-NINE
- BUTANEDIOIC ACID MONO(2,2-DIMETHYLHYDRAZIDE)
- Daminozide
- DIMAS
- DIMETHYLAMINOSUCCINAMIC ACID
- 2,2-DIMETHYLHYDRAZID KYSELINY JANTAROVE
- DMASA
- DMSA
- KYLAR
- NCI-C03827
- N-DIMETHYL AMINO-beta-CARBAMYL PROPIONIC ACID
- N-(DIMETHYLAMINO)SUCCINAMIC ACID
- N-DIMETHYLAMINO-SUCCINAMIDSAEURE
- SADH
- SUCCINIC ACID 2,2-DIMETHYLHYDRAZIDE
- SUCCINIC ACID, MONO(2,2-DIMETHYLHYDRAZIDE)
- SUCCINIC 1,1-DIMETHYL HYDRAZIDE