P-XYLENE CAS#106-42-3

CAS Number: 106-42-3
Chemical Formula: C8H10
Synonyms:

P-XYLENE FOR ANALYSIS EMSURE
P-XYLENE FOR SYNTHESIS 1 L;p-Xylene (1.4-;p-Xylene for HPLC, >=99%;p-Xylene puriss. p.a., >=99.0% (GC);p-Xylene ReagentPlus(R), 99%
C6H4(CH3)2;p-Xylene in Dimethyl Sulfoxide, USP 467 Standard

Appearance: Transperant Liquid

MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)

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Product Details

P-XYLENE CAS#106-42-3

p-xylene is an aromatic hydrocarbon based on benzene with two methyl substituents with the chemical formula C8H10 or C6H4(CH3)2. It is one of the three isomers of dimethylbenzene known collectively as xylenes. The “p” stands for para, identifying that he two methyl groups in p-xylene occupy the diametrically opposite substituent positions 1 and 4. p-Xylene is a colorless, flammable liquid practically insoluble in water. p-Xylene is a colorless watery liquid with a sweet odor and is dangerously flammable, with a flash point of 27°C. p-Xylene is widely used as a feedstock (or “building block”) to manufacture other industrial chemicals, notably terephthalic acid (TPA), purified terephthalic acid (PTA) and dimethyl-terephthalate (DMT). It also may be polymerised directly to produce parylene.

P-XYLENE Chemical Properties

Melting point	12-13 °C (lit.)
Boiling point	138 °C (lit.)
density	0.861 g/mL at 20 °C (lit.)
vapor density	3.7 (vs air)
vapor pressure	9 mm Hg ( 20 °C)
refractive index	n20/D 1.495(lit.)
Fp	77 °F
storage temp.	Store at +5°C to +30°C.
solubility	water: soluble0.2g/L
pka	>15 (Christensen et al., 1975)
form	Liquid
color	Colorless
Relative polarity	0.074
Odor	Like benzene; characteristic aromatic.
Odor Threshold	0.058ppm
explosive limit	1.1-7%(V)
Water Solubility	Miscible with alcohol, ether, acetone, benzene and chloroform. Immiscible with water.
λmax	λ: 294 nm Amax: 1.00 λ: 320 nm Amax: 0.10 λ: 350 nm Amax: 0.05 λ: 380-400 nm Amax: 0.01
Merck	14,10081
BRN	1901563
Henry's Law Constant	16.1 at 45.00 °C, 18.6 at 50.00 °C, 20.3 at 55.00 °C, 23.4 at 60.00 °C, 30.5 at 70.00 °C (static headspace-GC, Park et al., 2004)
Dielectric constant	2.6（20℃）
Exposure limits	TLV-TWA100 ppm (～434 mg/m3) (ACGIH, MSHA, and OSHA); STEL 150 ppm (～651 mg/m3) (ACGIH); ceiling 200 ppm/ 10 min (NIOSH); IDLH 1000 ppm (NIOSH).
Stability:	Stable. Incompatible with oxidizing agents. Hygroscopic. Flammable.
Major Application	environmental
InChI	1S/C8H10/c1-7-3-5-8(2)6-4-7/h3-6H,1-2H3
InChIKey	URLKBWYHVLBVBO-UHFFFAOYSA-N
SMILES	Cc1ccc(C)cc1
LogP	3.16 at 20℃
Surface tension	28.11mN/m at 298.15K
CAS DataBase Reference	106-42-3(CAS DataBase Reference)
EPA Substance Registry System	p-Xylene (106-42-3)
ECETOC JACC REPORT	P-XYLENE (106-42-3)

Safety Information

Hazard Codes	Xn,T,F
Risk Statements	10-20/21-38-39/23/24/25-23/24/25-11
Safety Statements	25-45-36/37-16-7
OEB	A
OEL	TWA: 100 ppm (435 mg/m3), STEL: 150 ppm (655 mg/m3)
RIDADR	UN 1307 3/PG 3
WGK Germany	2
RTECS	ZE2625000
Autoignition Temperature	984 °F
TSCA	TSCA listed
HazardClass	3
PackingGroup	III
HS Code	29024300
Storage Class	3 - Flammable liquids
Hazard Classifications	Acute Tox. 4 Dermal Acute Tox. 4 Inhalation Aquatic Chronic 3 Asp. Tox. 1 Eye Irrit. 2 Flam. Liq. 3 Skin Irrit. 2 STOT SE 3
Hazardous Substances Data	106-42-3(Hazardous Substances Data)
Toxicity	LD50 orally in Rabbit: 3910 mg/kg

Product Application Of P-XYLENE CAS#106-42-3

As solvent; raw material for production of benzoic acid, phthalic anhydride, isophthalic and terephthalic acids as well as their dimethyl esters used in the manufacture of polyester fibers; manufacture of dyes and other organics; sterilizing catgut; with Canada balsam as oil-immersion in microscopy; clearing agent in microscope technique.

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