*** CHEMICAL IDENTIFICATION ***
RTECS NUMBER : CZ4500000
CHEMICAL NAME : Benzene, o-dichloro-
CAS REGISTRY NUMBER : 95-50-1
LAST UPDATED : 199712
DATA ITEMS CITED : 69
MOLECULAR FORMULA : C6-H4-Cl2
MOLECULAR WEIGHT : 147.00
WISWESSER LINE NOTATION : GR BG
COMPOUND DESCRIPTOR : Agricultural Chemical
Tumorigen
Mutagen
Reproductive Effector
Primary Irritant
SYNONYMS/TRADE NAMES :
* Benzene, 1,2-dichloro-
* Chloroben
* o-Dichlorbenzene
* o-Dichlor benzol
* o-Dichlorobenzene
* 1,2-Dichlorobenzene
* o-Dichlorobenzene
* Dilatin DB
* Dizene
* Dowtherm E
* NCI-C54944
* Orthodichlorobenzene
* Orthodichlorobenzol
* Special termite fluid
* Termitkil
*** HEALTH HAZARD DATA ***
** SKIN/EYE IRRITATION DATA **
TYPE OF TEST : Rinsed with water
ROUTE OF EXPOSURE : Administration into the eye
SPECIES OBSERVED : Rodent - rabbit
DOSE/DURATION : 100 mg/30S
REACTION SEVERITY : Mild
REFERENCE :
AMIHAB AMA Archives of Industrial Health. (Chicago, IL) V.11-21, 1955-60.
For publisher information, see AEHLAU. Volume(issue)/page/year: 17,180,1958
** ACUTE TOXICITY DATA **
TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 500 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
WRPCA2 World Review of Pest Control. (London, UK) V.1-10, 1962-71.
Discontinued. Volume(issue)/page/year: 9,119,1970
TYPE OF TEST : LCLo - Lowest published lethal concentration
ROUTE OF EXPOSURE : Inhalation
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 821 ppm/7H
TOXIC EFFECTS :
Behavioral - general anesthetic
Liver - hepatitis (hepatocellular necrosis), zonal
Sense Organs and Special Senses (Eye) - lacrimation
REFERENCE :
AMIHAB AMA Archives of Industrial Health. (Chicago, IL) V.11-21, 1955-60.
For publisher information, see AEHLAU. Volume(issue)/page/year: 17,180,1958
TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Intraperitoneal
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 840 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
MEPAAX Medycyna Pracy. Industrial Medicine. (Ars-Polona, POB 1001, 00-068
Warsaw 1, Poland) V.1- 1950- Volume(issue)/page/year: 20,519,1969
TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Subcutaneous
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 5 gm/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
TSCAT* Office of Toxic Substances Report. (U.S. Environmental Protection
Agency, Office of Toxic Substances, 401 M St., SW, Washington, DC 20460)
Volume(issue)/page/year: OTS 205976
TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - mouse
DOSE/DURATION : 4386 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
YKYUA6 Yakkyoku. Pharmacy. (Nanzando, 4-1-11, Yushima, Bunkyo-ku, Tokyo,
Japan) V.1- 1950- Volume(issue)/page/year: 32,471,1981
TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Intraperitoneal
SPECIES OBSERVED : Rodent - mouse
DOSE/DURATION : 1228 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
MUTAEX Mutagenesis. (Oxford Univ. Press, Pinkhill House, Southfield Road,
Eynsham, Oxford OX8 1JJ, UK) V.1- 1986- Volume(issue)/page/year: 2,111,1987
TYPE OF TEST : LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE : Intravenous
SPECIES OBSERVED : Rodent - mouse
DOSE/DURATION : 400 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
JPBAA7 Journal of Pathology and Bacteriology. (London, UK) V.1-96,
1892-1968. For publisher information, see JPTLAS. Volume(issue)/page/year:
44,281,1937
TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rabbit
DOSE/DURATION : 500 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
85ARAE "Agricultural Chemicals," Thomson, W.T., 4 vols., Fresno, CA, Thomson
Publications, 1976/77 revision Volume(issue)/page/year: 3,32,1976/1977
TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Administration onto the skin
SPECIES OBSERVED : Rodent - rabbit
DOSE/DURATION : >10 gm/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
NTIS** National Technical Information Service. (Springfield, VA 22161)
Formerly U.S. Clearinghouse for Scientific & Technical Information.
Volume(issue)/page/year: OTS0521597
TYPE OF TEST : LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE : Intravenous
SPECIES OBSERVED : Rodent - rabbit
DOSE/DURATION : 250 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
JPBAA7 Journal of Pathology and Bacteriology. (London, UK) V.1-96,
1892-1968. For publisher information, see JPTLAS. Volume(issue)/page/year:
44,281,1937
TYPE OF TEST : LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - guinea pig
DOSE/DURATION : 2 gm/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
14CYAT "Industrial Hygiene and Toxicology," 2nd ed., Patty, F.A., ed., New
York, John Wiley & Sons, Inc., 1958-63 Volume(issue)/page/year: 2,1336,1963
TYPE OF TEST : LCLo - Lowest published lethal concentration
ROUTE OF EXPOSURE : Inhalation
SPECIES OBSERVED : Rodent - guinea pig
DOSE/DURATION : 800 ppm/24H
TOXIC EFFECTS :
Liver - hepatitis (hepatocellular necrosis), diffuse
REFERENCE :
JPBAA7 Journal of Pathology and Bacteriology. (London, UK) V.1-96,
1892-1968. For publisher information, see JPTLAS. Volume(issue)/page/year:
44,281,1937
** OTHER MULTIPLE DOSE TOXICITY DATA **
TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 27300 ug/kg/39W-I
TOXIC EFFECTS :
Kidney, Ureter, Bladder - other changes in urine composition
Blood - agranulocytosis
Blood - changes in erythrocyte (RBC) count
REFERENCE :
GISAAA Gigiena i Sanitariya. For English translation, see HYSAAV. (V/O
Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1- 1936-
Volume(issue)/page/year: 33(10),15,1968
TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 3 gm/kg/10D-I
TOXIC EFFECTS :
Liver - changes in liver weight
Endocrine - changes in spleen weight
Blood - changes in leukocyte (WBC) count
REFERENCE :
DCTODJ Drug and Chemical Toxicology. (Marcel Dekker, 270 Madison Ave., New
York, NY 10016) V.1- 1977/78- Volume(issue)/page/year: 14,83,1991
TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 32500 mg/kg/13W-I
TOXIC EFFECTS :
Liver - changes in liver weight
Endocrine - changes in spleen weight
Blood - changes in erythrocyte (RBC) count
REFERENCE :
NTPTR* National Toxicology Program Technical Report Series. (Research
Triangle Park, NC 27709) No.206- Volume(issue)/page/year: NTP-TR-255,1985
TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - mouse
DOSE/DURATION : 7 gm/kg/14D-I
TOXIC EFFECTS :
Liver - fatty liver degeneration
Related to Chronic Data - death
REFERENCE :
NTPTR* National Toxicology Program Technical Report Series. (Research
Triangle Park, NC 27709) No.206- Volume(issue)/page/year: NTP-TR-255,1985
TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - mouse
DOSE/DURATION : 32500 mg/kg/13W-I
TOXIC EFFECTS :
Liver - changes in liver weight
Endocrine - changes in spleen weight
REFERENCE :
NTPTR* National Toxicology Program Technical Report Series. (Research
Triangle Park, NC 27709) No.206- Volume(issue)/page/year: NTP-TR-255,1985
** REPRODUCTIVE DATA **
TYPE OF TEST : TCLo - Lowest published toxic concentration
ROUTE OF EXPOSURE : Inhalation
SPECIES OBSERVED : Rodent - rat
DOSE : 200 ppm/6H
SEX/DURATION : female 6-15 day(s) after conception
TOXIC EFFECTS :
Reproductive - Specific Developmental Abnormalities - musculoskeletal system
REFERENCE :
FAATDF Fundamental and Applied Toxicology. (Academic Press, Inc., 1 E.
First St., Duluth, MN 55802) V.1- 1981- Volume(issue)/page/year:
5,190,1985
TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Intraperitoneal
SPECIES OBSERVED : Rodent - rat
DOSE : 50 mg/kg
SEX/DURATION : male 1 day(s) pre-mating
TOXIC EFFECTS :
Reproductive - Paternal Effects - spermatogenesis (incl. genetic material,
sperm morphology, motility, and count)
REFERENCE :
JACTDZ Journal of the American College of Toxicology. (Mary Ann Liebert,
Inc., 1651 Third Ave., New York, NY 10128) V.1-12, 1982-1993. Discontinued.
Volume(issue)/page/year: 4(1),224,1985
** MUTATION DATA **
TYPE OF TEST : Sperm Morphology
ROUTE OF EXPOSURE : Intraperitoneal
TEST SYSTEM : Rodent - rat
DOSE/DURATION : 250 mg/kg
REFERENCE :
JACTDZ Journal of the American College of Toxicology. (Mary Ann Liebert,
Inc., 1651 Third Ave., New York, NY 10128) V.1-12, 1982-1993. Discontinued.
Volume(issue)/page/year: 4(2),224,1985
TYPE OF TEST : Micronucleus test
ROUTE OF EXPOSURE : Intraperitoneal
TEST SYSTEM : Rodent - mouse
DOSE/DURATION : 187 mg/kg/24H
REFERENCE :
MUTAEX Mutagenesis. (Oxford Univ. Press, Pinkhill House, Southfield Road,
Eynsham, Oxford OX8 1JJ, UK) V.1- 1986- Volume(issue)/page/year: 2,111,1987
TYPE OF TEST : Mutation in microorganisms
TEST SYSTEM : Rodent - mouse Lymphocyte
DOSE/DURATION : 6500 ug/L
REFERENCE :
SCIEAS Science. (American Assoc. for the Advancement of Science, 1333 H
St., NW, Washington, DC 20005) V.1- 1895- Volume(issue)/page/year:
236,933,1987
TYPE OF TEST : Sister chromatid exchange
TEST SYSTEM : Rodent - hamster Ovary
DOSE/DURATION : 59 mg/L
REFERENCE :
SCIEAS Science. (American Assoc. for the Advancement of Science, 1333 H
St., NW, Washington, DC 20005) V.1- 1895- Volume(issue)/page/year:
236,933,1987
*** REVIEWS ***
ACGIH TLV-Not classifiable as a human carcinogen
DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices
(BEIs) booklet issues by American Conference of Governmental Industrial
Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year:
TLV/BEI,1997
ACGIH TLV-STEL 301 mg/m3 (50 ppm)
DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices
(BEIs) booklet issues by American Conference of Governmental Industrial
Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year:
TLV/BEI,1997
ACGIH TLV-TWA 150 mg/m3 (25 ppm)
DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices
(BEIs) booklet issues by American Conference of Governmental Industrial
Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year:
TLV/BEI,1997
IARC Cancer Review:Human Inadequate Evidence
IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals
to Man. (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210)
V.1- 1972- Volume(issue)/page/year: 7,231,1974
IARC Cancer Review:Animal Inadequate Evidence
IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals
to Man. (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210)
V.1- 1972- Volume(issue)/page/year: 7,231,1974
IARC Cancer Review:Human Inadequate Evidence
IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals
to Man. (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210)
V.1- 1972- Volume(issue)/page/year: 29,213,1982
IARC Cancer Review:Animal Inadequate Evidence
IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals
to Man. (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210)
V.1- 1972- Volume(issue)/page/year: 29,213,1982
IARC Cancer Review:Group 3
IMSUDL IARC Monographs, Supplement. (WHO Publications Centre USA, 49
Sheridan Ave., Albany, NY 12210) No.1- 1979- Volume(issue)/page/year:
7,192,1987
*** U.S. STANDARDS AND REGULATIONS ***
EPA FIFRA 1988 PESTICIDE SUBJECT TO REGISTRATION OR RE-REGISTRATION
FEREAC Federal Register. (U.S. Government Printing Office, Supt. of
Documents, Washington, DC 20402) V.1- 1936- Volume(issue)/page/year:
54,7740,1989
MSHA STANDARD:air-CL 50 ppm (300 mg/m3)
DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices
(BEIs) booklet issues by American Conference of Governmental Industrial
Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: 3,76,1971
OSHA PEL (Gen Indu):CL 50 ppm (300 mg/m3)
CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt.
of Documents, Washington, DC 20402) Volume(issue)/page/year:
29,1910.1000,1994
OSHA PEL (Construc):CL 50 ppm (300 mg/m3)
CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt.
of Documents, Washington, DC 20402) Volume(issue)/page/year:
29,1926.55,1994
OSHA PEL (Shipyard):CL 50 ppm (300 mg/m3)
CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt.
of Documents, Washington, DC 20402) Volume(issue)/page/year:
29,1915.1000,1993
OSHA PEL (Fed Cont):CL 50 ppm (300 mg/m3)
CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt.
of Documents, Washington, DC 20402) Volume(issue)/page/year:
41,50-204.50,1994
*** OCCUPATIONAL EXPOSURE LIMITS ***
OEL-AUSTRALIA:TWA 50 ppm (300 mg/m3) JAN 1993
OEL-AUSTRIA:TWA 50 ppm (300 mg/m3) JAN 1993
OEL-BELGIUM:STEL 50 ppm (301 mg/m3);Skin JAN 1993
OEL-DENMARK:STEL 50 ppm (300 mg/m3) JAN 1993
OEL-FINLAND:TWA 50 ppm (300 mg/m3);STEL 75 ppm (450 mg/m3);Skin JAN 1993
OEL-FRANCE:STEL 50 ppm (300 mg/m3) JAN 1993
OEL-GERMANY:TWA 50 ppm (300 mg/m3);Skin JAN 1993
OEL-HUNGARY:TWA 50 mg/m3;STEL 100 mg/m3;Skin JAN 1993
OEL-JAPAN:STEL 50 ppm (300 mg/m3) JAN 1993
OEL-THE NETHERLANDS:TWA 50 ppm (300 mg/m3) JAN 1993
OEL-THE PHILIPPINES:TWA 50 ppm (300 mg/m3) JAN 1993
OEL-POLAND:TWA 20 mg/m3 JAN 1993
OEL-RUSSIA:STEL 50 mg/m3 JAN 1993
OEL-SWEDEN:STEL 50 ppm (300 mg/m3) JAN 1993
OEL-SWITZERLAND:TWA 50 ppm (300 mg/m3);STEL 100 ppm (600 mg/m3) JAN 1993
OEL-THAILAND:TWA 50 ppm (300 mg/m3) JAN 1993
OEL-TURKEY:TWA 50 ppm (300 mg/m3) JAN 1993
OEL-UNITED KINGDOM:TWA 50 ppm (300 mg/m3);STEL 50 ppm JAN 1993
OEL IN BULGARIA, COLOMBIA, JORDAN, KOREA check ACGIH TLV
OEL IN NEW ZEALAND, SINGAPORE, VIETNAM check ACGIH TLV
*** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA ***
NIOSH RECOMMENDED EXPOSURE LEVEL (REL) :
NIOSH REL TO o-DICHLOROBENZENE-air:CL 50 ppm
REFERENCE :
NIOSH* National Institute for Occupational Safety and Health, U.S. Dept. of
Health, Education, and Welfare, Reports and Memoranda.
Volume(issue)/page/year: DHHS #92-100,1992
NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA :
NOHS - National Occupational Hazard Survey (1974)
NOHS Hazard Code - 24003
No. of Facilities: 8838 (estimated)
No. of Industries: 83
No. of Occupations: 69
No. of Employees: 72149 (estimated)
NOES - National Occupational Exposure Survey (1983)
NOES Hazard Code - 24003
No. of Facilities: 10577 (estimated)
No. of Industries: 59
No. of Occupations: 59
No. of Employees: 92246 (estimated)
No. of Female Employees: 12686 (estimated)
*** STATUS IN U.S. ***
EPA TSCA Section 8(b) CHEMICAL INVENTORY
EPA TSCA 8(a) PRELIMINARY ASSESSMENT INFORMATION, FINAL RULE
FEREAC Federal Register. (U.S. Government Printing Office, Supt. of
Documents, Washington, DC 20402) V.1- 1936- Volume(issue)/page/year:
47,26992,82
EPA TSCA Section 8(d) unpublished health/safety studies
On EPA IRIS database
EPA TSCA TEST SUBMISSION (TSCATS) DATA BASE, JUNE 1998
NIOSH Analytical Method, 1994: Hydrocarbons, halogenated, 1003
NIOSH Analytical Method, 1996: Volatile organic compound, 2549
NTP Carcinogenesis Studies (gavage);no evidence:mouse,rat
NTPTR* National Toxicology Program Technical Report Series. (Research
Triangle Park, NC 27709) No.206- Volume(issue)/page/year: NTP-TR-255,85
*** END OF RECORD ***