CAS No.1330-20-7,Xylene Suppliers,MSDS download

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Basic Information

Molecular Structure:
CAS No.:	1330-20-7
Name:	Xylene

Formula:	C₈H₁₀
Molecular Weight:	106.18
Synonyms:	Dimethylbenzene;Xylene mixture (60% m-xylene, 9% o-xylene, 14% p-xylene, 17% ethylbenzene);Xylenes (mixed);Xylol;Benzene,dimethyl-;Eylene;
EINECS:	215-535-7
Density:	0.865 g/cm³
Melting Point:	-34 ºC
Boiling Point:	136-140 ºC
Flash Point:	21 ºC
Solubility:	water: <0.1 g/L (20 ºC)
Appearance:	colourless liquid
Hazard Symbols:	Xn,F
Risk Codes:	10-20/21-36/38
Safety:	25
Transport Information:	UN 1307
PSA:	0.00000
LogP:	2.30340

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Consensus Reports

Reported in EPA TSCA Inventory. EPA Genetic Toxicology Program. Community Right-To-Know List.

Standards and Recommendations

OSHA PEL: TWA 100 ppm; STEL 150 ppm
ACGIH TLV: TWA 100 ppm; STEL 150 ppm; BEI: methyl hippuric acids in urine at end of shift 1.5 g/g creatinine; Not Classifiable as a Human Carcinogen
DFG MAK: (all isomers) 100 ppm (440 mg/m³); BAT: 150 μg/dL in blood at end of shift
NIOSH REL: (Xylene) TWA 100 ppm; CL 200 ppm/10M
DOT Classification: 3; Label: Flammable Liquid

Analytical Methods

For occupational chemical analysis use NIOSH: Hydrocarbons, Aromatic, 1501.

Specification

A xylene is an aromatic hydrocarbon consisting of a benzene ring with two methyl substituents. The three isomeric xylenes each have a molecular formula of C₈H₁₀, though the more informative semi-structural formula C₆H₄(CH₃)₂ is also used commonly. With the cas number 1330-20-7, it is also called Dimethylbenzene, Methyltoluene, Xylol (mixed isomers). A xylene is any of a group of very similar organic compounds. They are clear liquids with a sweet odor.

Physical properties about xylene are: (1)ACD/LogP: 3.271; (2)ACD/LogD (pH 5.5): 3.27; (3)ACD/LogD (pH 7.4): 3.27; (4)ACD/BCF (pH 5.5): 180.19; (5)ACD/BCF (pH 7.4): 180.19; (6)ACD/KOC (pH 5.5): 1433.03; (7)ACD/KOC (pH 7.4): 1433.03; (8)Index of Refraction: 1.5; (9)Molar Refractivity: 35.903 cm³; (10)Molar Volume: 121.984 cm³; (11)Polarizability: 14.233 10-24cm³; (12)Surface Tension: 28.7910003662109 dyne/cm; (13)Density: 0.87 g/cm³; (14)Flash Point: 25 °C; (15)Enthalpy of Vaporization: 35.66 kJ/mol; (16)Boiling Point: 140.567 °C at 760 mmHg; (17)Vapour Pressure: 7.61299991607666 mmHg at 25°C

Preparation of xylene: Xylenes are produced by dehydrocyclodimerization and by methylating of toluene and benzene. Via the Isomar process, the ratio of isomers can be shifted to favor p-xylene, which is most valued. This conversion is catalyzed by zeolites.

Uses of xylene: Like other solvents, Xylene (CAS NO.1330-20-7) is also used as an inhalant drug for its intoxicating properties. Xylene is often used as a solvent and in the printing, rubber, and leather industries. It is also used as a cleaning agent for steel and for silicon wafers and chips, a thinner for paint, a pesticide , and in paints and varnishes. In animal studies it is often swabbed on the ears of rabbits to facilitate blood flow and collection, although the area must subsequently be cleansed with alcohol to prevent inflammation. In biochemistry, xylene is also used for making slides of specimens hydrophobic in preparation for coverslip mounting.

You can still convert the following datas into molecular structure:
(1)Smilesc1(ccccc1)C.C*;

The toxicity data is as follows:

Organism	Test Type	Route	Reported Dose (Normalized Dose)	Effect	Source
guinea pig	LCLo	inhalation	450ppm (450ppm)	LIVER: FATTY LIVER DEGERATION LUNGS, THORAX, OR RESPIRATION: OTHER CHANGES	Journal of Industrial Hygiene. Vol. 10, Pg. 261, 1928.
guinea pig	LDLo	intraperitoneal	2gm/kg (2000mg/kg)	LIVER: FATTY LIVER DEGERATION	American Industrial Hygiene Association Journal. Vol. 35, Pg. 21, 1974.
human	LDLo	oral	50mg/kg (50mg/kg)		Gekkan Yakuji. Pharmaceuticals Monthly. Vol. 22, Pg. 883, 1980.
human	TCLo	inhalation	200ppm (200ppm)	SENSE ORGANS AND SPECIAL SENSES: CONJUNCTIVE IRRITATION: EYE SENSE ORGANS AND SPECIAL SENSES: OTHER CHANGES: OLFACTION LUNGS, THORAX, OR RESPIRATION: OTHER CHANGES	Journal of Industrial Hygiene and Toxicology. Vol. 25, Pg. 282, 1943.
mammal (species unspecified)	LC50	inhalation	30gm/m3 (30000mg/m3)		Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 32(10), Pg. 25, 1988.
mammal (species unspecified)	LD50	oral	4300mg/kg (4300mg/kg)		Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 32(10), Pg. 25, 1988.
mammal (species unspecified)	LDLo	intraperitoneal	2gm/kg (2000mg/kg)	PERIPHERAL NERVE AND SENSATION: FLACCID PARALYSIS WITHOUT ANESTHESIA (USUALLY NEUROMUSCULAR BLOCKAGE) BEHAVIORAL: IRRITABILITY BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD	American Journal of Hygiene. Vol. 7, Pg. 276, 1927.
man	LCLo	inhalation	10000ppm/6H (10000ppm)	BLOOD: OTHER CHANGES LUNGS, THORAX, OR RESPIRATION: CYANOSIS BEHAVIORAL: GENERAL ANESTHETIC	British Medical Journal. Vol. 3, Pg. 442, 1970.
mouse	LD50	intraperitoneal	1548mg/kg (1548mg/kg)		Archiv fuer Gewerbepathologie und Gewerbehygiene. Vol. 18, Pg. 109, 1960.
mouse	LD50	oral	2119mg/kg (2119mg/kg)		EHP, Environmental Health Perspectives. Vol. 106(Suppl,
rabbit	LD50	skin	> 1700mg/kg (1700mg/kg)		Raw Material Data Handbook, Vol.1: Organic Solvents, 1974. Vol. 1, Pg. 123, 1974.
rabbit	LDLo	intravenous	129mg/kg (129mg/kg)		Haematologica. Vol. 58, Pg. 491, 1973.
rat	LC50	inhalation	5000ppm/4H (5000ppm)		Raw Material Data Handbook, Vol.1: Organic Solvents, 1974. Vol. 1, Pg. 123, 1974.
rat	LD50	intraperitoneal	2459mg/kg (2459mg/kg)		Environmental Research. Vol. 40, Pg. 411, 1986.
rat	LD50	oral	4300mg/kg (4300mg/kg)	KIDNEY, URETER, AND BLADDER: OTHER CHANGES LIVER: OTHER CHANGES	AMA Archives of Industrial Health. Vol. 14, Pg. 387, 1956.
rat	LD50	subcutaneous	1700mg/kg (1700mg/kg)		Raw Material Data Handbook, Vol.1: Organic Solvents, 1974. Vol. 1, Pg. 123, 1974.