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Petroleum ether

2020-01-15 669 time Back

The composition is pentane and hexane colorless and transparent liquid with coal oil and gas; vapor pressure 53.32kPa / 20 ℃; flash point <-20 ℃; melting point <-73 ℃; boiling point 40 ~ 80 ℃; solubility: insoluble in water, Soluble in most organic solvents such as absolute ethanol, benzene, chloroform and oil; density: relative density (water = 1) 0.64 ~ 0.66; relative density (air = 1) 2.50; stability: stable; danger mark 7 (flammable) Liquid); main use: mainly used as a solvent and as a grease extraction

  2. Impact on the environment:

  I. Health hazards

  Invasion route: inhalation, ingestion.

  Health hazard: Its vapor or mist is irritating to eyes, mucous membranes and respiratory tract. Poisoning symptoms can include burning, coughing, wheezing, laryngitis, shortness of breath, headache, nausea, and vomiting. This product can cause peripheral neuritis. Strongly irritating to the skin.

  2. Toxicological information and environmental behavior

  Acute toxicity: LD5040mg / kg (mouse vein); LC503400ppm, 4 hours (rat inhalation)

  Hazardous characteristics: Its vapor can form explosive mixture with air. Case of open flame and high heat can cause combustion and explosion. A large amount of smoke is generated when burning. It can react with oxidants. After high-speed impact, flow, and shock, it can cause combustion explosion due to electrostatic spark discharge. Its vapor is heavier than air and can spread to a relatively low place at a lower place. It will reignite when exposed to open flames.

  Combustion (decomposition) products: carbon monoxide, carbon dioxide.

  3.On-site emergency monitoring method:

  4.Laboratory monitoring method:

  Gas chromatography, with reference to the Handbook of Analytical Chemistry (fourth volume, chromatographic analysis), Chemical Industry Press

  5.Environmental standards:

  American Workshop Hygienic Standard 100ppm

  6.Emergency treatment and disposal methods:

  First, emergency response to leakage

  Quickly evacuate personnel from the leaked contaminated area to a safe area and isolate them to strictly restrict access. Cut off the fire. It is recommended that emergency handlers wear self-contained positive-pressure respirators and fire protective clothing. Cut off the source of the leak if possible. Prevent entry into restricted spaces such as sewers and flood drains. Small leaks: Absorb with activated carbon or other inert materials. It can also be brushed with an emulsion made of a non-combustible dispersant, and the washing liquid is diluted and put into a wastewater system. Large leaks: construction of dikes or pits for containment; covering with foam to reduce steam disasters. Use explosion-proof pump to transfer to tanker or special collector, recycle or transport to waste disposal place for disposal.

  Second, protective measures

  Respiratory protection: When the concentration in the air exceeds the standard, wear a filtering gas mask (half-mask).

  Eye protection: Wear chemical safety protective glasses.

  Body protection: Wear antistatic work clothes.

  Hand protection: Wear latex gloves.

  Others: Smoking, eating and drinking are not allowed on the job site. After work, take a shower and change clothes. Pay attention to personal hygiene.

  Third, first aid measures

  Skin contact: Remove contaminated clothing immediately and rinse skin thoroughly with soap and water.

  Eye contact: Raise the eyelids immediately and rinse thoroughly with plenty of running water or saline for at least 15 minutes. Seek medical attention.

  Inhalation: Quickly leave the scene to fresh air. Keep your airways open. If breathing is difficult, give oxygen. If not breathing, give artificial respiration immediately. Seek medical attention.

  Ingestion: Rinse mouth with water and drink milk or egg white. Seek medical attention.

  Extinguishing method: Cool the container with water spray. If possible, move the container from the fire to an open area. Containers in the fire area must be evacuated immediately if they have changed colour or made a sound from a safety pressure relief device. Fire extinguishing agent: foam, dry powder, carbon dioxide, sand. Water extinguishing is not effective.

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