214736

Xylenes

reagent grade

• Synonym(s): Xylene mixture of isomers
• Linear Formula: C₆H₄(CH₃)₂
• CAS Number: 1330-20-7
• Molecular Weight: 106.17
• EC Number: 215-535-7
• MDL number: MFCD00077264
• UNSPSC Code: 12352002
• PubChem Substance ID: 329752157
• NACRES: NA.21
• grade: reagent grade
• bp: 137-140 °C (lit.)
• vapor pressure: 18 mmHg ( 37.7 °C)

Properties

• grade: reagent grade
• Quality Level: 100
• vapor density: 3.7 (vs air)
• vapor pressure: 18 mmHg ( 37.7 °C)
• Assay: ≥75.0% (xylenes isomers)
• form: liquid
• autoignition temp.: 867 °F
• expl. lim.: 7 %
• dilution: (for analytical testing)
• impurities: ≤25% ethylbenzene
• refractive index: n20/D 1.497 (lit.)
• bp: 137-140 °C (lit.)
• mp: -34 °C (lit.)
• density: 0.86 g/mL at 25 °C (lit.)
• SMILES string: Cc1ccc(C)cc1.Cc2cccc(C)c2.Cc3ccccc3C
• InChI: 1S/3C8H10/c1-7-3-5-8(2)6-4-7;1-7-4-3-5-8(2)6-7;1-7-5-3-4-6-8(7)2/h3*3-6H,1-2H3
• InChI key: MVZVDAGWAAZJPE-UHFFFAOYSA-N

Description

General description

Xylenes is the mixture of isomeric ortho-, meta- and para-forms of xylene. Its dispersed emission and time of flight mass spectra has been reported. Transitions from S_{1 ↔} S₀ states have been found to be within the range of 100cm^-1 and were reported to be arising due to the internal rotation of ring methyl groups. Time-resolvedin situ FTIR spectroscopic and gas chromatographic studies have been carried out to study its diffusion coefficients, adsorption rates and isomerization efficacy over HSZM-5 surfaces.

Application

Xylenes may be employed in chloramphenicol acetyltransferase (CAT) assay to evaluate the CAT gene expression.

Safety Information

• Pictograms: GHS02,GHS08,GHS07
• Signal Word: Danger
• Hazard Statements: H226,H304,H312 + H332,H315,H319,H335,H373,H412
• Precautionary Statements: P210 - P273 - P280 - P301 + P310 - P303 + P361 + P353 - P331
• 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 RE 2 Inhalation - STOT SE 3
• Target Organs: Central nervous system,Liver,Kidney, Respiratory system
• Storage Class Code: 3 - Flammable liquids
• WGK: WGK 2
• Flash Point(F): 77.0 °F - closed cup
• Flash Point(C): 25 °C - closed cup