*** CHEMICAL IDENTIFICATION ***
RTECS NUMBER : OX6825000
CHEMICAL NAME : Mesitylene
CAS REGISTRY NUMBER : 108-67-8
LAST UPDATED : 199710
DATA ITEMS CITED : 15
MOLECULAR FORMULA : C9-H12
MOLECULAR WEIGHT : 120.21
WISWESSER LINE NOTATION : 1R C1 E1
COMPOUND DESCRIPTOR : Human
Primary Irritant
SYNONYMS/TRADE NAMES :
* Benzene, 1,3,5-trimethyl-
* 3,5-Dimethyltoluene
* Fleet-X
* sym-Trimethylbenzene
* Trimethylbenzol
*** HEALTH HAZARD DATA ***
** SKIN/EYE IRRITATION DATA **
TYPE OF TEST : Standard Draize test
ROUTE OF EXPOSURE : Administration onto the skin
SPECIES OBSERVED : Rodent - rabbit
DOSE/DURATION : 20 mg/24H
REACTION SEVERITY : Moderate
REFERENCE :
85JCAE "Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J.,
Prague, Czechoslovakia, Avicenum, 1986 Volume(issue)/page/year: -,34,1986
TYPE OF TEST : Standard Draize test
ROUTE OF EXPOSURE : Administration into the eye
SPECIES OBSERVED : Rodent - rabbit
DOSE/DURATION : 500 mg/24H
REACTION SEVERITY : Mild
REFERENCE :
85JCAE "Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J.,
Prague, Czechoslovakia, Avicenum, 1986 Volume(issue)/page/year: -,34,1986
** ACUTE TOXICITY DATA **
TYPE OF TEST : TCLo - Lowest published toxic concentration
ROUTE OF EXPOSURE : Inhalation
SPECIES OBSERVED : Human
DOSE/DURATION : 10 ppm
TOXIC EFFECTS :
Peripheral Nerve and Sensation - sensory change involving peripheral nerve
Behavioral - somnolence (general depressed activity)
Lungs, Thorax, or Respiration - structural or functional change in trachea
or bronchi
REFERENCE :
ZUBEAQ Zeitschrift fuer Unfallmedizin und Berufskrankheiten. Revue de
Medecine des Accidents et des Maladies Professionelles. (Verlag
Berichthaus, Zwingliplatz 3, Postfach, CH-8022, Zurich, Switzerland) V.1-
1907- Volume(issue)/page/year: 49,265,1956
TYPE OF TEST : LC50 - Lethal concentration, 50 percent kill
ROUTE OF EXPOSURE : Inhalation
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 24 gm/m3/4H
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
GISAAA Gigiena i Sanitariya. For English translation, see HYSAAV. (V/O
Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1- 1936-
Volume(issue)/page/year: 44(5),15,1979
TYPE OF TEST : LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE : Intraperitoneal
SPECIES OBSERVED : Rodent - guinea pig
DOSE/DURATION : 1303 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
AMIHBC AMA Archives of Industrial Hygiene and Occupational Medicine.
(Chicago, IL) V.2-10, 1950-54. For publisher information, see AEHLAU.
Volume(issue)/page/year: 9,227,1954
** OTHER MULTIPLE DOSE TOXICITY DATA **
TYPE OF TEST : TCLo - Lowest published toxic concentration
ROUTE OF EXPOSURE : Inhalation
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 20 mg/m3/24H/17W-I
TOXIC EFFECTS :
Kidney, Ureter, Bladder - other changes in urine composition
Biochemical - Enzyme inhibition, induction, or change in blood or tissue
levels - catalases
REFERENCE :
GISAAA Gigiena i Sanitariya. For English translation, see HYSAAV. (V/O
Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1- 1936-
Volume(issue)/page/year: 44(5),15,1979
*** OCCUPATIONAL EXPOSURE LIMITS ***
OEL-DENMARK:TWA 25 ppm (120 mg/m3) JAN 1993
OEL-SWEDEN:TWA 25 ppm (120 mg/m3);STEL 35 ppm (170 mg/m3) JAN 1993
OEL-SWITZERLAND:TWA 25 ppm (125 mg/m3) 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 OCCUPATIONAL EXPOSURE SURVEY DATA :
NOES - National Occupational Exposure Survey (1983)
NOES Hazard Code - T1998
No. of Facilities: 495 (estimated)
No. of Industries: 4
No. of Occupations: 6
No. of Employees: 12997 (estimated)
No. of Female Employees: 231 (estimated)
*** STATUS IN U.S. ***
EPA TSCA Section 8(b) CHEMICAL INVENTORY
EPA TSCA Section 8(d) unpublished health/safety studies
EPA TSCA TEST SUBMISSION (TSCATS) DATA BASE, JUNE 1998
*** END OF RECORD ***