o-Xylene (CAS 95-47-6) is an aromatic hydrocarbon widely used in chemical manufacturing. It is commonly used as a solvent and is also a raw material for the production of phthalic anhydride. Is o-xylene flammable? The answer is yes: o-xylene is a flammable liquid and must be handled with appropriate precautions.
Properties of Ortho-Xylene
Molecular Formula: C₈H₁₀
IUPAC Name: 1,2-dimethylbenzene
Boiling Point: 144°C (291.2°F)
Melting Point: -25°C
Density: 0.88 g/cm³ at 20°C
Solubility: Slightly soluble in water, but very soluble in organic solvents such as ether, acetone, benzene, and toluene.
What Is the Flash Point of o-Xylene?
The flash point is the lowest temperature at which a liquid produces enough vapor to form an ignitable mixture under the specified test conditions.
| Property | Reference Value | Notes |
|---|---|---|
| Chemical Name | o-Xylene | Ortho-xylene |
| CAS Number | 95-47-6 | - |
| Flash Point | Approximately 30–32°C | Commonly reported closed-cup data; verify the test method |
| Normal Boiling Point | Approximately 144.4–144.5°C | At atmospheric pressure |
| Lower Explosive Limit (LEL) | Approximately 0.9% by volume | In air |
| Upper Explosive Limit (UEL) | Approximately 6.7% by volume | In air |
These are reference values, not a replacement for the current SDS. The reported flash point may vary with the test method and source.
CAS 95-47-6 o-Xylene liquid is flammable at room temperature or slightly above room temperature. The risk increases significantly in hot climates or poorly ventilated areas.
Does o-Xylene Catch Fire at Room Temperature?
Not automatically. A flash point indicates the conditions under which a liquid can produce ignitable vapor in a specified test; it does not mean that ignition occurs without an ignition source.
At temperatures approaching or exceeding its flash point, o-xylene may generate ignitable vapor. Heat, sparks, open flames and electrostatic discharge can create ignition risks when vapor and air are present in a flammable concentration range.
The actual risk depends on temperature, ventilation, vapor concentration, handling conditions and potential ignition sources.
Why Does the Flash Point Matter During Storage and Transport?
The flash point is one of the properties used to assess the fire hazards of a liquid. For o-xylene buyers, it is relevant to:
- Storage: Select a suitable storage area and follow applicable flammable-liquid requirements.
- Loading and unloading: Control ignition sources and follow appropriate grounding and bonding procedures.
- Ventilation: Avoid vapor accumulation, especially in enclosed or poorly ventilated areas.
- Shipment planning: Confirm the applicable dangerous-goods classification, packaging and documentation requirements against the current SDS and transport regulations.
o-Xylene (ortho-xylene) CAS 95-47-6 Supplier
o-xylene - Hazards identification
| Section | Hazard class | Category | Hazard statement |
|---|---|---|---|
| 2.6 | Flammable liquid | 3 | H226 |
| 3.1D | Acute toxicity (dermal) | 4 | H312 |
| 3.11 | Acute toxicity (inhalation) | 4 | H332 |
| 3.2 | Skin corrosion/irritation | 2 | H315 |
| 3.3 | Serious eye damage/eye irritation | 2 | H319 |
| 3.8R | Specific target organ toxicity - single exposure (respiratory tract irritation) | 3 | H335 |
| 3.9 | Specific target organ toxicity - repeated exposure | 2 | H373 |
| 3.10 | Aspiration hazard | 1 | H304 |
| Category | Code/Name | Text Description |
|---|---|---|
| Hazard statements | H226 | Flammable liquid and vapour |
| H304 | May be fatal if swallowed and enters airways | |
| H312+H332 | Harmful in contact with skin or if inhaled | |
| H315 | Causes skin irritation | |
| H319 | Causes serious eye irritation | |
| H335 | May cause respiratory irritation | |
| H373 | May cause damage to organs (respiratory tract) through prolonged or repeated exposure | |
| Precautionary statements (Prevention) | P210 | Keep away from heat, sparks, open flames, hot surfaces. No smoking |
| P260 | Do not breathe mist/vapours/spray | |
| P280 | Wear protective gloves/protective clothing | |
| Precautionary statements (Response) | P301+P310 | IF SWALLOWED: Immediately call a POISON CENTER/doctor |
| P302+P352 | IF ON SKIN: Wash with plenty of water | |
| P331 | Do NOT induce vomiting |
o-xylene solvent - Safe Handling and Storage
Safe Handling
- Ventilation: Use exhaust fans or closed ventilation systems, especially in enclosed spaces.
- Avoid Ignition: Keep away from heat sources, sparks, and open flames. Use only tools that will not generate sparks.
- Static Electricity Safety: Ground containers when handling liquids to prevent static electricity buildup.
- Personal Protective Equipment: Wear chemically resistant gloves (e.g., nitrile gloves), safety goggles, and protective clothing.
- Hygiene: Never inhale vapors. Wash hands after handling. Eating and smoking are prohibited in the work area.
- Training: Workers must understand how to handle this substance, use personal protective equipment, and respond to emergencies.
Safe Storage
- Storage Location: o-xylene is a flammable liquid, should be stored in a cool, dry, well-ventilated place, away from direct sunlight.
- Containers: Keep lids tightly closed, keep containers upright and grounded.
- Incompatible Substances: Keep away from strong oxidizers and strong acids.
- Emergency Equipment: Safety showers and eyewash stations should be available nearby.
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| Packaging Type | Net Weight |
|---|---|
| Steel Drum | 250 kg |
| IBC Tank | 1250 kg |
| ISO Tank | Bulk shipment |
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