CAS 109-66-0 n-Pentane – Basic Information
CAS：109-66-0
Chinese Name: 正戊烷
English Name: n-Pentane
Chinese alias: pentane; n-pentane;
English alias:
Molecular formula: C5H12
Molecular weight: 72.15
109-66-0 n-pentane – physicochemical properties
[density]: 0.6 ± 0.1 g / cm
[boiling point]: 35.2 ± 3.0 ℃ at 760 mmHg
[melting point]: – 130 ° C
[flash point]: – 49.4 ± 0.0 ℃
[ LogP ]：3.41
[appearance character]: transparent colorless liquid
[steam pressure]: 526.7 ± 0.0 mmHg at 25 ℃
[storage condition]:
Store in a cool and ventilated warehouse. Keep away from fire and heat sources. The storage temperature should not exceed 29 ℃. Keep the container sealed. It should be stored separately from oxidant and should not be mixed. Explosion proof lighting and ventilation facilities are adopted. It is forbidden to use mechanical equipment and tools that are easy to produce sparks. The storage area shall be equipped with leakage emergency treatment equipment and appropriate materials.
[stability]:
- Pentane is aliphatic saturated hydrocarbon with stable chemical properties and does not react with acid and alkali at normal temperature and pressure. The mixture of propylene, butene, isobutene, butane and isopropane is produced by pyrolysis at high temperature above 600 ℃ or in the presence of appropriate catalyst. Aluminum trichloride was used as catalyst for isomerization to produce 2-methylbutane.
- Stability
- Strong oxidant, strong acid, strong base and halogen are prohibited
- Polymerization hazard does not polymerize
[molecular structure]: - Molar refractive index: 25.21
- Molar volume (cm 3 / mol): 111.0
- Isotonic specific volume (90.2k): 231.0
- Surface tension (dyne / cm): 18.7
- Polarizability (10 ⁻ cm ⁴ 3): 9.99
[computational chemistry]: - Reference value of hydrophobic parameter calculation (xlogp): none
- Number of hydrogen bond donors: 0
- Number of hydrogen bonded receptors: 0
- Number of rotatable chemical bonds: 2
- Number of tautomers: none
- Topological molecular polar surface area 0
- Number of heavy atoms: 5
- Surface charge: 0
- Complexity: 7.5
- Number of isotope atoms: 0
- Determine the number of atomic conformation centers: 0
- Number of uncertain atomic conformation centers: 0
- Determine the number of chemical bond conformation centers: 0
- Number of uncertain chemical bond conformation centers: 0
- Number of covalent bond units: 1
[more]: - Character: colorless liquid, with faint mint flavor.
- Melting point (℃): – 129.8
- Boiling point (℃): 36.1
- Relative density (water = 1): 0.63
- Relative vapor density (air = 1): 2.48
- Saturated vapor pressure (kPa): 53.32 (18.5 ℃)
- Heat of combustion (kJ / mol): – 3245
- Critical temperature (℃): 196.6
- Critical pressure (MPA): 3.37
- Octanol / water partition coefficient: 3.39
- Flash point (℃): – 48 (TOC)
- Ignition temperature (℃): 260
- Upper explosion limit (%): 7.8
- Lower explosion limit (%): 1.5
Solubility: slightly soluble in water, soluble in ethanol, ether, acetone, benzene, chloroform and other organic solvents. - Body expansion coefficient: 0.001569
- Viscosity (20 ℃, liquid) / MPa · s: 0.29
- Aniline point / ℃: 70.7
- Critical density (g · cm-3): 0.232
- Critical volume (cm 3 · mol-1): 311
- Critical compressibility factor: 0.268
- Eccentricity factor: 0.249
- Lennard Jones parameter (a): 5.7634
- Lennard Jones parameter (k): 344.70
- Solubility parameter (J · cm-3) 0.5:14.439
- Van der Waals area (cm ﹤ mol-1): 8.290 × 109
- Van der Waals volume (cm 3 · mol-1): 58.030
- Standard gas phase combustion heat (enthalpy) (kJ · mol-1): – 3535.73
- Vapor standard enthalpy (kJ · mol-1): – 146.82
Gas phase standard entropy (J · mol-1 · k-1): 349.56 - Gas phase standard free energy of formation (kJ · mol-1): – 8.6
- Gas phase standard hot melt (J · mol-1 · k-1): 120.04
- Standard heat of combustion (enthalpy) (kJ · mol-1): – 3509.00
- Standard enthalpy of liquid phase (kJ · mol-1): – 173.55
- Standard entropy of liquid phase (J · mol-1 · k-1): 263.47
- Standard free energy of formation in liquid phase (kJ · mol-1): – 10.00
- Liquid standard hot melt (J · mol-1 · k-1): 167.33
109-66-0 n-pentane – Safety Information
[symbol]: ghs02, ghs07, ghs08, ghs09
Signal word: danger
[supplementary hazard statement]: repeated exposure may cause skin dryness or cracking
[warning statement]: p210-p301 + p310-p331-p370 + p378-p403 + p235
[personal protective equipment]: eyeshields; Faceshields; full face respirator (US); glasses; multi-purpose combination respirator cartridge (US)
[hazard code (Europe)]: xn: harmful
[risk statement (Europe)]: R12; R51 / 53; R65; R66; r67
[dangerous goods transport code]: UN 1265
109-66-0 n-pentane – MSDS
Part I: chemical name
Chinese name of chemical: pentane
Chemical name: n-pentane
Chinese name 2: n-pentane
English name 2:
Technical specification code: 372
CAS No.：109-66-0
Molecular formula: C5H12
Molecular weight: 72.15
Part 2: Composition / information
Content of harmful components CAS No
Pentane 109-66-0
The third part: risk overview
Risk category:
Invasion route:
Health hazard: high concentration can cause mild irritation of eye and respiratory mucosa, anesthesia state, and even loss of consciousness. The chronic effects were mild irritation of eyes and respiratory tract. May cause mild dermatitis.
Environmental hazards:
Explosion hazard: extremely flammable.
Part four: first aid measures
Skin contact: take off contaminated clothes and wash skin thoroughly with soapy water and water.
Eye contact: lift the eyelids and rinse with flowing water or normal saline. See a doctor.
Inhalation: quickly leave the site to fresh air. Keep the respiratory tract unobstructed. If breathing is difficult, give oxygen. If breathing stops, perform artificial respiration immediately. See a doctor.
Ingestion: drink enough warm water to induce vomiting. See a doctor.
Part V: fire fighting measures
Hazard characteristics: extremely flammable, its vapor and air can form an explosive mixture, in case of open fire and high heat, it is easy to burn and explode. It reacts strongly with oxidant and even causes combustion. Liquid is lighter than water, insoluble in water, can drift with water and spread to the distance, and cause combustion in case of open fire. In the fire scene, the heated container may explode. Its vapor is heavier than air and can spread to a considerable distance at a lower place, and it will ignite and reburning when encountering fire source.
Harmful combustion products: carbon monoxide, carbon dioxide.
Fire fighting method: spray water to cool the container and move it from the fire site to an open place if possible. If the containers in the fire scene have changed color or sound from the safety pressure relief device, they must be evacuated immediately. Fire extinguishing agents: foam, carbon dioxide, dry powder and sand. Fire fighting with water is ineffective.
Part six: emergency treatment of leakage
Emergency treatment: quickly evacuate the personnel from the leakage contaminated area to the safe area, isolate them and strictly restrict their access. Cut off the fire. It is suggested that emergency treatment personnel should wear self-contained positive pressure respirator and anti-static work clothes. Cut off the leakage source as much as possible. Prevent from flowing into the restricted space such as sewers and flood discharge ditches. Small leakage: absorb with activated carbon or other inert materials. Large amount of leakage: build a dike or dig a pit to contain it. Cover with foam to reduce steam damage. Transfer to tank car or special collector with explosion-proof pump, recycle or transport to waste disposal site for disposal.
Part 7: handling and storage
Operation precautions: airtight operation and full ventilation. Operators must be specially trained and strictly abide by the operation rules. It is suggested that the operators should wear self-priming filter type gas mask (half mask), chemical safety glasses, anti-static work clothes and rubber oil resistant gloves. Keep away from fire and heat sources. Smoking is strictly prohibited in the workplace. Use explosion-proof ventilation system and equipment. Prevent vapor from leaking into the air of the workplace. Avoid contact with oxidants. When filling, the flow rate should be controlled, and there should be grounding device to prevent the accumulation of static electricity. When handling, it should be light loading and unloading to prevent damage to the packaging and containers. Fire fighting equipment and leakage emergency treatment equipment of corresponding variety and quantity shall be provided. The empty container may contain harmful substances.
Storage precautions: store in cool and ventilated warehouse. Keep away from fire and heat sources. The storage temperature should not exceed 30 ℃. Keep the container sealed. It should be stored separately from oxidant and should not be mixed. Explosion proof lighting and ventilation facilities are adopted. It is forbidden to use mechanical equipment and tools that are easy to produce sparks. The storage area shall be equipped with leakage emergency treatment equipment and appropriate materials.
Part 8: exposure control / personal protection
Occupational exposure limits
China MAC (mg / m3): no standard
MAC (mg / m3): 300
TLVTN：OSHA 1000ppm; ACGIH 600ppm,1770mg/m3
TLVWN：ACGIH 750ppm,2210mg/m3
Monitoring method:
Engineering control: the production process is airtight and fully ventilated. Provide safety shower and eye wash equipment.
Respiratory system protection: generally no special protection is required. When the air concentration is high, it is recommended to wear self-priming filter type gas mask (half mask).
Eye protection: wear chemical safety glasses when necessary.
Body protection: wear anti-static work clothes.
Hand protection: wear rubber oil resistant gloves.
Other protection: smoking is strictly prohibited at the work site. Avoid repeated contact for a long time.
Part 9: physical and chemical properties
Main ingredient: pure product
Appearance and character: colorless liquid with faint mint fragrance.
pH：
Melting point (℃): – 129.8
Boiling point (℃): 36.1
Relative density (water = 1): 0.63
Relative vapor density (air = 1): 2.48
Saturated vapor pressure (kPa): 53.32 (18.5 ℃)
Heat of combustion (kJ / mol): 3506.1
Critical temperature (℃): 196.4
Critical pressure (MPA): 3.37
Logarithm of octanol / water partition coefficient: no data
Flash point (℃): – 40
Ignition temperature (℃): 260
Upper explosion limit% (V / V): 1.7
Lower explosion limit% (V / V): 9.8
Solubility: slightly soluble in water, soluble in ethanol, ether, acetone, benzene, chloroform and other organic solvents.
Main uses: used as solvent, making artificial ice, anesthetic, synthesis of pentanol, isopentane, etc.
Other physical and chemical properties:
Part 10: stability and reactivity
Stability:
Prohibited substance: strong oxidant.
Conditions to avoid contact:
Polymerization hazard:
Decomposition products:
Part 11: toxicological information
Acute toxicity: LD50: 446 mg / kg (mouse vein)
LC50: no data
Subacute and chronic toxicity:
thrill:
Sensitization:
Mutagenicity:
Teratogenicity:
Carcinogenicity:
Part 12: ecological information
Ecotoxicity:
Biodegradability:
Non biodegradability:
Bioaccumulation or bioaccumulation:
Other harmful effects: the substance may be harmful to the environment. Special attention should be paid to the pollution of surface water, soil, air and drinking water.
Part 13: waste disposal
Nature of waste:
Abandoned area