The GB/T 22053-2008 standard summary for Pentane Vesicant:
- Standard Number: GB/T 22053-2008
- Chinese Title: 戊烷发泡剂
- English Title: Pentane Vesicant
- Scope:
- Applies to pentane vesicant refined by distillation from pentane-containing raw materials
- Primarily used as a blowing agent in expandable polystyrene and flexible polyurethane production
- Also applicable as a chemical or laboratory solvent
- Molecular Formula: C₅H₁₂
- Relative Molecular Mass: 72.15 (based on 2001 international atomic weights)
Grades and Composition
Pentane vesicant consists of n-pentane (nCs) and isopentane (iCs), available in 11 grades:
| Grade | n-Pentane (%) | Isopentane (%) |
|---|
| Fo | 0 | 100 |
| F1 | 10 | 90 |
| F2 | 20 | 80 |
| F3 | 30 | 70 |
| F4 | 40 | 60 |
| F5 | 50 | 50 |
| F6 | 60 | 40 |
| F7 | 70 | 30 |
| FB | 80 | 20 |
| F9 | 90 | 10 |
| F10 | 100 | 0 |
Note: nCs and iCs content may vary within ±5% based on demand.
Technical Requirements
- Appearance: Clear, colorless liquid with no turbidity
- Relative Retention Values (selected components):
| Component | Retention Value |
|---|
| Isobutane | 0.368 |
| n-Butane | 0.531 |
| Isopentane | 1.000 |
| n-Pentane | 1.237 |
| n-Hexane | 2.658 |
| Benzene | 3.329 |
Inspection Rules
- Types of Inspection:
- Factory Inspection: Conducted by the manufacturer’s quality department; includes total pentane content and C6+ components
- Type Inspection: Covers all parameters; performed at least once per month during normal production
- Acceptance: Must be completed within 15 days of receipt by the user
- Sampling: As per SY/T 0543
- Judgment: Based on GB/T 1250 rounding comparison method; if any parameter fails, retest from double units. If retest fails, the batch is rejected.
Labeling, Packaging, Transport, Storage
- Labeling:
- Must include product name, trademark, grade, manufacturer name and address, net weight, batch number, standard code, and “flammable” symbol per GB 190
- Packaging:
- Filling coefficient for tankers or containers must not exceed 0.85
- Transport:
- Ensure ventilation, avoid impact, dragging, direct sunlight, and open flames; comply with national hazardous goods transport regulations
- Storage:
- Separate from oxygen, compressed air, oxidizers
- Avoid heat sources, sunlight, rain
- Display “No Smoking/Fire” signs, implement fire/explosion protection measures, and equip with appropriate fire extinguishers
- Physical Hazards:
- Highly flammable; vapor forms explosive mixtures with air
- Vapor is heavier than air and may travel to ignition sources
- Health Hazards:
- Low toxicity
- High concentrations may irritate eyes and respiratory tract, cause anesthesia or unconsciousness
- Chronic exposure may lead to mild dermatitis and mucosal irritation
- Protective equipment required in high-concentration environments
Referenced Standards (selected)
- GB/T 259 – Determination of water-soluble acids and bases in petroleum products
- GB/T 1250 – Rounding and judgment methods for limit values
- SH 0164 – Packaging, storage, and delivery rules for petroleum products
- SY/T 0542 – Gas chromatography method for light hydrocarbon components
- SY/T 0543 – Sampling method for stable light hydrocarbons