o-Xylene manufacturers and suppliers

o-Xylene suppliers

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℃

Safety Information

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

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

Use

o-Xylene (4.4Kg) is sulfonated by stirring for 4hours with 2.5L of conc H2SO4 at 95o. After cooling, and separating the unsulfonated material, the product is diluted with 3L of water and neutralised with 40% NaOH. On cooling, sodium o-xylene sulfonate separates and is recrystallised from half its weight of water. [A further crop of crystals is obtained by concentrating the mother liquor to one-third of its volume.] The salt is dissolved in the minimum amount of cold water, then mixed with the same amount of cold water, and with the same volume of conc H2SO4 and heated to 110o. o-Xylene is regenerated and steam distils. The distillate is saturated with NaCl, the organic layer is separated, dried and redistilled. [Beilstein 5 H 362, 5 I 179, 5 II 281, 5 III 807, 5 IV 917.]

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