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P-XYLENE

Description References
P-XYLENE
P-XYLENE structure
CAS No.
106-42-3
Chemical Name:
P-XYLENE
Synonyms
p-Xylol;4-xylene;P-XYLENE;ai3-52255;1,4-Xylene;Scintillar;PARA-XYLENE;Xylene, P-;'LGC' (2031);P-XYLENE 99%
CBNumber:
CB2136488
Molecular Formula:
C8H10
Formula Weight:
106.17
MOL File:
106-42-3.mol

P-XYLENE 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.)
Flash point:
77 °F
storage temp. 
0-6°C
solubility 
water: soluble0.2g/L
form 
Liquid
color 
Colorless
Relative polarity
0.074
Odor
Like benzene; characteristic aromatic.
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
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.
InChIKey
URLKBWYHVLBVBO-UHFFFAOYSA-N
CAS DataBase Reference
106-42-3(CAS DataBase Reference)
SAFETY
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
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  ZE2625000
Autoignition Temperature 984 °F
TSCA  Yes
HazardClass  3
PackingGroup  III
HS Code  29024300
Toxicity LD50 orally in Rabbit: 3910 mg/kg
Symbol(GHS):
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H226 Flammable liquid and vapour Flammable liquids Category 3 Warning
H304 May be fatal if swallowed and enters airways Aspiration hazard Category 1 Danger
H312 Harmful in contact with skin Acute toxicity,dermal Category 4 Warning P280,P302+P352, P312, P322, P363,P501
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H332 Harmful if inhaled Acute toxicity,inhalation Category 4 Warning P261, P271, P304+P340, P312
H336 May cause drowsiness or dizziness Specific target organ toxicity,single exposure; Narcotic effects Category 3 Warning P261, P271, P304+P340, P312,P403+P233, P405, P501
H360 May damage fertility or the unborn child Reproductive toxicity Category 1A, 1B Danger
H370 Causes damage to organs Specific target organ toxicity, single exposure Category 1 Danger P260, P264, P270, P307+P311, P321,P405, P501
H371 May cause damage to organs Specific target organ toxicity, single exposure Category 2 Warning P260, P264, P270, P309+P311, P405,P501
H411 Toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 2
Precautionary statements:
P201 Obtain special instructions before use.
P202 Do not handle until all safety precautions have been read and understood.
P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P233 Keep container tightly closed.
P240 Ground/bond container and receiving equipment.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash hands thoroughly after handling.
P264 Wash skin thouroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P271 Use only outdoors or in a well-ventilated area.
P273 Avoid release to the environment.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P311 Call a POISON CENTER or doctor/physician.
P391 Collect spillage. Hazardous to the aquatic environment
P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.
P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P370+P378 In case of fire: Use … for extinction.

P-XYLENE price More Price(26)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 134449 p-Xylene ReagentPlus , 99% 106-42-3 1l $101 2018-11-13 Buy
Sigma-Aldrich 134449 p-Xylene ReagentPlus , 99% 106-42-3 4l $265 2018-11-13 Buy
Alfa Aesar A10534 p-Xylene, 99% 106-42-3 100ml $18.7 2018-11-13 Buy
Alfa Aesar A10534 p-Xylene, 99% 106-42-3 500ml $28 2018-11-13 Buy
Sigma-Aldrich 95680 p-Xylene analytical standard 106-42-3 5ml $49.4 2018-11-13 Buy

P-XYLENE Chemical Properties,Uses,Production

Description

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.

References

1.https://en.wikipedia.org/wiki/P-Xylene
2.https://pubchem.ncbi.nlm.nih.gov/compound/p-xylene#section=Top
3.https://www.chemicalsafetyfacts.org/paraxylene/

Chemical Properties

colourless liquid

Uses

Xylene occurs in petroleum solvents andgasoline. The widest applications of xyleneare as solvents in paints, coatings, and rubber.Xylene isomers are used in the manufacture ofdyes, drugs, pesticides, and in many organicintermediates, such as terephthalic acid andphthalic anhydride.

Definition

ChEBI: A xylene with methyl groups at positions 1 and 4.

Uses

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.

General Description

A colorless watery liquid with a sweet odor. Less dense than water. Insoluble in water. Irritating vapor. Freezing point is 56°F.

Air & Water Reactions

Highly flammable. Insoluble in water.

Reactivity Profile

P-XYLENE may react with oxidizing materials. . Acetic acid forms explosive mixtures with P-XYLENE and air (Shraer, B.I. 1970. Khim. Prom. 46(10):747-750.).

Health Hazard

Vapors cause headache and dizziness. Liquid irritates eyes and skin. If taken into lungs, causes severe coughing, distress, and rapidly developing pulmonary edema. If ingested, causes nausea, vomiting, cramps, headache, and coma. Can be fatal. Kidney and liver damage can occur.

Health Hazard

The toxic properties of xylene isomers aresimilar to toluene or ethylbenzene. The targetorgans are the central nervous system, eyes,gastrointestinal tract, kidneys, liver, blood,and skin, which, however, are affected onlyat high levels of exposure. In humans itsexposure may cause irritation of the eyes,nose, and throat, headache, dizziness, excitement,drowsiness, nausea, vomiting, abdominalpain, and dermatitis. The irritation effectsin humans may be felt at a concentration of200 ppm in air, while exposure to 10,000 ppmfor 6–8 hours may be fatal.
The oral toxicity of xylene is low. Ingestionof a high dose, however, can causedepression of the central nervous system,dizziness, nausea, and vomiting and abdominalpain. The oral LD50 values in ratsfor xylene isomers are within the range of5000 mg/kg.
The major route of absorption of xyleneis inhalation. Another significant route isskin absorption of the liquid. About 5% ofabsorbed xylene is excreted unchanged inexpired air within a few hours, while less than2% is hydroxylated to xylenols. Over 90% ofabsorbed xylenes are metabolized to o-, m-,and p-isomers of methyl benzoic acid andexcreted in urine as methyl hippuric acids(ACGIH 1986). Small amounts of xylenesmay remain stored in adipose tissue. Repeatedexposures may cause accumulation in theblood.

Fire Hazard

Behavior in Fire: Vapor is heavier than air and may travel considerable distance to a source of ignition and flash back.

Fire Hazard

Flash Point (°F): 81 ℃; Flammable Limits in Air (%): 1.1-6.6; Fire Extinguishing Agents: Foam, dry chemical, or carbon dioxide; Fire Extinguishing Agents Not To Be Used: Water may be ineffective; Special Hazards of Combustion Products: Not pertinent; Behavior in Fire: Vapor is heavier than air and may travel considerable distance to a source of ignition and flash back; Ignition Temperature (°F): 870; Electrical Hazard: Class I, Group D; Burning Rate: 5.8 mm/min.

Chemical Reactivity

Reactivity with Water No reaction; Reactivity with Common Materials: No reaction; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent; Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.

Safety Profile

Moderately toxic by intraperitoneal route. Mildly toxic by ingestion and inhalation. An experimental teratogen. Experimental reproductive effects. May be narcotic in hgh concentrations. Chronic toxicity not established, but is less toxic than benzene. A very dangerous fire hazard when exposed to heat or flame; can react with oxidzing materials. Explosive in the form of vapor when exposed to heat or flame. To fight fire, use foam, CO2, dry chemical. Potentially explosive reaction with acetic acid + air, 1,3-dichloro-5,5-dimethyl-2,4- imidazolidinhone, nitric acid + pressure. When heated to decomposition it emits acrid smoke and irritating fumes. See also other xylene entries.

Purification Methods

The general purification methods listed for xylene above are applicable. p-Xylene can readily be separated from its isomers by crystallisation from such solvents as MeOH, EtOH, isopropanol, acetone, butanone, toluene, pentane or pentene. It can be further purified by fractional crystallisation by partial freezing, and stored over sodium wire or molecular sieves Linde type 4A. [Stokes & French J Chem Soc, Faraday Trans 1 76 537 1980, Beilstein 5 H 382, 5 I 185, 5 II 296, 5 III 845, 5 IV 951.]

P-XYLENE Preparation Products And Raw materials

Raw materials

Preparation Products


P-XYLENE Suppliers

Global( 190)Suppliers
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P-XYLENE Spectrum


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