Home Categories Organic Chemistry o-Xylene
A8435612

o-Xylene , CP , 95-47-6

Synonym(s):
o-Xylene;1,2-Dimethylbenzene;Dimethylbenzenes, Dimethylbenzene;Xylene mixture of isomers

CAS NO.:95-47-6

Empirical Formula: C8H10

Molecular Weight: 106.17

MDL number: MFCD00008519

EINECS: 202-422-2

Update time: 2022-07-08

PRODUCT Properties

Melting point: -26--23 °C (lit.)
Boiling point: 143-145 °C (lit.)
Density  0.879 g/mL at 20 °C (lit.)
vapor density  3.7 (vs air)
vapor pressure  <0.1 atm ( 21.1 °C)
refractive index  n20/D 1.505(lit.)
Flash point: 90 °F
storage temp.  Store below +30°C.
solubility  water: partially soluble0.1705 g/L at 25°C
form  Solid or Crystalline Powder
pka >15 (Christensen et al., 1975)
color  Yellow to beige
Odor Benzene-like; characteristic aromatic.
Odor Threshold 0.38ppm
explosive limit 1.0-7.6%(V)
Water Solubility  Sparingly soluble in water. (0.2g/L)
λmax λ: 288 nm Amax: 1.00
λ: 300 nm Amax: 0.40
λ: 325 nm Amax: 0.05
λ: 350-400 nm Amax: 0.01
Merck  14,10081
BRN  1815558
Henry's Law Constant 14.0 at 45.00 °C, 16.4 at 50.00 °C, 19.0 at 55.00 °C, 21.3 at 60.00 °C, 26.3 at 70.00 °C (static headspace-GC, Park et al., 2004)
Exposure limits NIOSH REL: 100 ppm (435 mg/m3), STEL 150 ppm (655 mg/m3), IDLH 900 ppm; OSHA PEL: TWA 100 ppm; ACGIH TLV: TWA 100 ppm, STEL 150 ppm (adopted).
Dielectric constant 2.5699999999999998
Stability: Stable. Incompatible with oxidizing agents. Flammable. Hygroscopic.
InChIKey CTQNGGLPUBDAKN-UHFFFAOYSA-N
LogP 3.16 at 20℃

Description and Uses

Preparation of phthalic acid, phthalic anhydride, terephthalic acid, isophthalic acid; solvent for alkyd resins, lacquers, enamels, rubber cements; manufacture of dyes, pharmaceuticals, and insecticides; motor fuels.

Safety

Symbol(GHS) 
GHS02,GHS07,GHS08
Signal word  Danger
Hazard statements  H226-H304-H312+H332-H315-H335-H412
Precautionary statements  P210-P273-P280-P301+P310-P303+P361+P353-P331
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
RIDADR  UN 1307 3/PG 3
OEB A
OEL TWA: 100 ppm (435 mg/m3), STEL: 150 ppm (655 mg/m3)
WGK Germany  2
RTECS  ZE2450000
Autoignition Temperature 867 °F
TSCA  Yes
HazardClass  3
PackingGroup  II
HS Code  29024100
Toxicity Acute oral LD50 in rats is approximately 5 g/kg (quoted, RTECS, 1992).
IDLA 900 ppm

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