Product name:
Keywords propylene glycol methyl ether, propylene glycol monomethyl ether,
English name:
Propylene glycol monomethyl ether, the trade name of Dow Chemical.
English abbreviation:
prime minister
China Academy of Sciences:
107-98-2
Product description:
Both propylene glycol ether and ethylene glycol ether are ethylene glycol ether solvents, and the toxicity of propylene glycol ether to human body is lower than that of ethylene glycol ether products, so it belongs to low toxic ethers. Propylene glycol methyl ether has a weak ether smell, but it has no strong pungent smell, so it is more widely used and safer. Because its molecular structure contains both ether groups and hydroxyl groups, it has excellent solubility, suitable volatilization rate and reactivity, and has been widely used. In addition to being used as a solvent for various high-grade coatings, it is also used as a volatilization rate controller and viscosity regulator in printing ink. It can also be used as a viscosity regulator in chemical intermediates and brake fluid formulations. Because propylene glycol methyl ether can be mixed with water in any proportion, it can be used as a solvent in the formula of metal cleaning agent, or in many fields such as reducing freezing point in antifreeze of automobile water tank.
[Edit this paragraph] Score
CH3CHOHCH2OCH3
[Edit this paragraph] Molecular weight
90. 12
[Edit this paragraph] Chemical composition of the product
About 75% of the harmful contents in the components of CAS code 1- methoxy -2- propanol 107-98-2 are 2- methoxy-1- propanol 1589-47-5, and about 25% are.
[Edit this paragraph] Product specifications
Appearance: Colorless and transparent liquid content: ≥99% water content: ≤0. 1% distillation range:16-126℃ acidity: ≤ 0.02% boiling point: 120℃ flash point: 3. 5438+09-0.924 viscosity: 20C/1.75mPa.s surface tension: (25℃) 27.7mn/m.
[Edit this paragraph] Harmfulness
Overview of emergency situation
Warning! Flammable liquids and vapors are harmful to human body if inhaled. It will affect people's central nervous system, and it will also cause harm to people if it is absorbed through the skin or eaten by mistake. Irritating to skin, eyes and respiratory tract. Safety level Health level: 1 (slight) Combustion level: 3 (flammable) Reaction level: 1 Contact level: 1 Protective equipment: goggles, protective clothing, masks, gloves and Class B fire extinguishers Storage color code: red (flammable) Potential health impact.
absorb
Vapor will be irritating to respiratory tract, and the vapor concentration is greater than 100ppm, which will produce unpleasant smell when inhaled. When the concentration reaches 1000ppm, there will be eye, nose and throat irritation before affecting the central nervous system. It can cause headaches, dizziness and drowsiness.
Eat sth by mistake
It can irritate gastrointestinal tract, with symptoms including nausea, vomiting and diarrhea, and other symptoms are similar to those when inhaled.
Skin contact
Can cause irritation, accompanied by erythema and pain, which may affect the whole body through skin absorption.
Eye contact
Can cause irritation, erythema and pain. Long-term exposure: Long-term exposure can damage the liver and kidneys. The deterioration of the above situation: not found.
[Edit this paragraph] First aid methods
Inhalation:
Move to a place with fresh air. If the patient can't breathe, please use artificial respiration. If breathing is difficult, give oxygen to the patient and seek medical advice in time.
Eating by mistake:
If eaten by mistake, give the patient plenty of water to dilute the solution. If the patient swallows heavily or has symptoms, he should be treated with drugs in time. Don't give anything to an unconscious person.
Skin contact:
Take off the contaminated clothes and shoes and immediately rinse them with plenty of water for at least 15 minutes. Clothes should be washed before wearing, and shoes should be thoroughly washed before wearing. If symptoms appear, you need to see a doctor.
Eye contact:
Immediately flush eyes with plenty of water for at least 15 minutes, and lift upper and lower eyelids from time to time. If the irritation persists, please seek medical attention.
[Edit this paragraph] Fire prevention measures
Flammable liquid. Flash point: 32℃(90F)CC's combustion limit in air (volume percentage) Lower limit: 1.6 Upper limit: 13.8 Explosion: The temperature is above the flash point, and the mixture of steam and air explodes within the above combustion limit. Steam can reach the surface of the burning object, and the flame will backfire. Fire extinguishing medium: dry powder compound, foam or carbon dioxide. Putting out the fire with water may not work. Spraying water can cool the burning container, dilute the overflow and make it a non-combustible mixture, thus protecting the safety of those who prevent leakage and vapor diffusion. Special fire information: Wear protective clothing in case of fire. Wear breathing assistance equipment with protective mask, which can work under specific pressure or other specific pressure modes.
[Edit this paragraph] Guide to accidental leakage
Circulate air in leakage and overflow areas. Remove all ignition sources and wear appropriate personal protective equipment. See section 8 for details. Isolate the dangerous area and evacuate irrelevant personnel and those without protective equipment. Control and cover the leaked liquid as much as possible. Use tools and equipment that will not generate sparks. Collect the leaked liquid in an appropriate container or absorb it with inert substances (such as dry sand, mud, etc.). ) into a chemical waste container. Do not use flammable materials, such as sawdust. Don't flush the leaked liquid into the sewer. If the leaked or spilled liquid is not ignited, spray it with water to disperse the steam, so as to protect the safety of people who prevent the leakage, and wash the leaked liquid from the exposed place.
[Edit this paragraph] Usage and storage method
Store in a low temperature, dry place with good air circulation, away from places where fires may occur. I prefer to store it outdoors or in a place that is not influenced by others, and separate it from things that are not suitable for storage. Containers should be connected and grounded to avoid electrostatic sparks. Smoking should be prohibited in places where the product is stored and used. Use tools and equipment that will not generate sparks. Empty barrels filled with the product can also be dangerous. As there are still residues (vapor, liquid) of this product in these containers, please check all warning signs posted on this product barrel.
Dipropylene glycol methyl ether (DPM)
Also known as propylene glycol monomethyl ether, propylene glycol monomethyl ether and propylene glycol monomethyl ether. DPM 1-(2- methoxypropoxy) -2- propanol. CASNo.: 34590-94-8 Molecular formula: C7H 16O3 Structural formula: C3H6OC3H6OH Molecular weight: 148.2.
[Edit this paragraph] Introduction:
1. Description: Colorless and transparent liquid, with faint ether smell. Low toxicity; Low viscosity; Low surface tension; The evaporation rate is moderate; Good solubility and coupling ability. 2. Solubility: it is miscible with water and has an appropriate HLB value. Soluble oil, natural resin and polymer chemicals, such as rubber, cellulose, polyvinyl acetate, polyvinyl acetal/butyraldehyde, alkyd resin, phenolic resin, urea-formaldehyde resin, etc. 3. Application: used as coupling agent for water-based diluted coatings (often mixed); Active solvents for water-based coatings; Household and industrial cleaning agents, degreasing agents and paint strippers, metal cleaning agents; Basic solvent and coupling agent for solvent-based screen printing ink; Coupling agents and solvents for vat dyes fabrics: coupling agents and skin care agents used in cosmetic formulations; Stabilizers for agricultural pesticides; Essence fixative; Floor brightener coagulant. Characteristics of dipropylene glycol methyl ether: acidity (calculated by acetic acid): 99.0 wt% density (at 25°C) 0.950 distillation range (at 760 mmHg)180-195 C evaporation rate (BuAc= 100) 2 boiling point: (. Flash point (closed cup) 75℃ (open cup) 85℃. Solubility (at 20℃, g/ 100g water) Intersolubility specific gravity (at 25/25℃) 0.95-0.953 Viscosity: (25℃)3.33 MPa. S surface tension (at 25℃) 28.8 dynes/cm refractive index (at 25℃) oral LD50 for rats = 5,500 mg/kg.
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