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O-Xylene

O-Xylene(Ortho-xylene)/1,2-Xylene/1,2 Dimethylbenzene is an aromatic hydrocarbon that appears as a colorless, transparent liquid with an aromatic odor similar to toluene. It is insoluble in water but readily soluble in ethanol, ether, chloroform, and other organic solvents. It is classified as a flammable and toxic chemical.

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Details description

1. Product Identification

Product Name	O-Xylene(Ortho-xylene)/1,2-Xylene/1,2 Dimethylbenzene
CAS No.	95-47-6
Molecular Formula	C8H10
Molecular Weight	106.17g/mol
EINECS No.	202-422-2
HS Code	2902.30
UN No.	1307
Hazard Class	Class3(FlammableLiquid)
Packing Group	III

2. Specifications

Item	Specification	Test Result	Method
Appearance	Clear&transparent,free from mechanical impurities	Clear&transparent	SH/T1613.1-2018
O-Xylenecontent,% (mass fraction)	≥98.0	98.74
p-Xylene+m-Xylene,% (wt)	≤1.3	0.990
Cumene,%(wt)	≤0.3	0.195
Non-aromatics+C9+ aromatics,%(wt)	≤1	0.263
Styrene,%(wt)	As per report	≤0.001
Acid-wash color	Acid layer color no darker than standard	Pass
Chromaticity(Pt-Co), Hazen	≤10	5
Bromineindex,mg Br/100g	≤100	6.2
Total Sulphur,mg/kg	≤5	0.2
Distillation range (101.3kPa):Total range,C	≤2.0(incl.144.4C)	1.5
Grade	Premium Grade	Premium Grade	--

3. Physical & Chemical Properties

Appearance	Colorless transparent liquid,aromatic odor like toluene
Melting Point / Freezing Point	-25 C
Boiling Point / Initial Boiling Point	144.4 C
Flash Point	32 C (closed cup)
Auto-ignition Temperature	463 C
Explosion Limits-Lower	0.9% (V/V)
Explosion Limits-Upper	7% (V/V)
Relative Density (water=1)	0.88
Relative Vapor Density (air=1)	3.66
Vapor Pressure	1.33 kPa at 32 C
Kinematic Viscosity	0.76mm 2/s at 25 C
Solubility in Water	Insoluble (0.02g/100mL)
Solubility in Organics	Miscible with ethanol, ether, chloroform and most organic solvents
n-Octanol / Water Partition Coefficient (Kow)	3.12
Heat of Combustion	4845.3 kJ/mol
Critical Temperature	359 C
Critical Pressure	3.70 MPa
Evaporation Rate	Not available

4. Applications

O-Xylene is mainly used as raw material for phthalic anhydride production. Other uses include:

* Solvent in paints, coatings, printing inks

* Intermediate for plasticizers, polyesters, alkyd resins

* Raw material for agricultural chemicals and pharmaceuticals

* Laboratory reagent

5. Packaging

* Bulk: ISO tank container

* Drum: 180 kg/drum, 80 drums per 20 ft container

* IBC: 1000 L IBC tank

6. Storage & Handling

* Store in a cool, well-ventilated area below 37 C, away from heat and ignition sources

* Keep containers tightly closed

* Use explosion-proof electrical equipment and ventilation systems

* Ground/bond containers during transfer to prevent electrostatic discharge

* Avoid inhalation of vapors and contact with skin/eyes

* Keep away from strong oxidizing agents and halogens

* Shelf life: 12 months under proper storage conditions

7. Transport Information

* UNNo.: 1307- Proper Shipping Name: XYLENES

* Hazard Class: 3- Packing Group: III

* IMDGCode: Class 3, Flash point 32 C c.c.

* Marine Pollutant: No

* Transport in steel tank vehicles (rail/highway), equipped with grounding chains

8. Toxicological Data

* LD50(oral, rat): 4300 mg/kg

* LC50 (inhalation, rat, 4h): 5000 ppm

* Skin irritation (rabbit): Moderate irritation at 500 mg/24h

* Eye irritation (rabbit): Mild to severe irritation

* IARC Carcinogenicity: Group 3 (not classifiable as to human carcinogenicity)

9. Regulatory Compliance

* China National Standard GB/T 2285-2018

* Dangerous Chemicals Catalog (2015)-- Listed

* Not listed in Highly Toxic Substances Catalog

* Not listed in Controlled Hazardous Chemicals

* Not listed in Precursor Chemicals Catalog

* Not listed in Explosive Precursors Catalog

* GHS Classification: Flammable Liquid Cat.3, Skin Irritation Cat.2, Aquatic Acute Cat.2