Propylene Glycol
Boxa Chemical Co.,Limited
Propylene Glycol
CAS No.:57-55-6
Min. Order: 500KG
Packaging: galvanized iron drums or plastic drums in 25 kg, 200 kg or 215 kg;

Overview:
Propylene Glycol can be used as a humectant in combination with glycerin or sorbitol in cosmetics, toothpaste and soap. In hair dyes,it is used as a moisturizing and leveling agent. It can also be used as an antifreeze, as well as in cellophane, plasticizer and pharmaceutical industry. Aqueous solutions of propylene glycol are effective antifreeze agents
Specifications
1.Propylene Glycol-Industrial grade

No. Item Quality
Superior Qualified
1 Appearance Colorless viscous transparent liquid without visible impurities
2 1,2-Propanediol, w/% ≥99.50 ≥99.00
3 Moisture, % ≤0.10 ≤0.20
4 Color(Pt-Co), Hazen ≤10 ≤15
5 Density(20℃)/(g/cm³) 1.035-1.038 1.035-1.040
6 Acidity(calculated as acetic acid), w/% ≤0.010 ≤0.020

2.Propylene Glycol-USP grade

No. Test Item Test Index
1 Identification Conform to the Spectrogram 706 of Atlas of Infrared Spectra of Drugs
2 Appearance Colorless transparent viscousliquid
3 Content ≥99.80%
4 EG ≤50ppm
5 DEG ≤50ppm
6 Residue on ignition ≤2.5mg
7 Chloridate ≤0.007%
8 Sulphate ≤0.006%
9 Heavy metals (in Pb) ≤5ppm
10 Relative density (25 ℃) 1.0350— 1.0370
Muiltple Specifications
Name Order Detail
Food additive Propylene Glycol Order Detail
Industrial Propylene Glycol Order Detail
Propylene Glycol [USP] Order Detail
Packing & Storage
Packing · It can be packaged in a galvanized iron bucket or a plastic drum, with specifications of 25 kg, 200 kg and 215 kg.
· It can be packaged in an ISO tank or according to the requirements of customers.
Storage Store in a cool, ventilated warehouse, the warehouse temperature should not exceed 37℃, the relative humidity should be controlled below 60%.
Shipping NONH for all modes of transport
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Functions and Applications
Propylene Glycol-Industrial grade:
Used for producing unsaturated resins, polyether polyols, epoxy resins, etc;
Used for organic synthesis, solvents, dehydrating agents, gas chromatography stationary liquids, synthesis of emulsifiers, demulsifiers, etc;
Chemical intermediate acting on the pesticide fungicide phenyl ether metronidazole;
Used in the glass paper, plasticizers, and pharmaceutical industry;
The aqueous solution of propylene glycol is an effective antifreeze;

Propylene Glycol-USP grade:
This product can be used as a carrier for human pharmaceutical drugs, as well as a granule drug agent, moisturizer, softener, and solvent;
It can also be used as a solvent in the field of veterinary medicine and pesticide;
It can be used in tobacco industry as tobacco essence, tobacco humectant and preservative;
It can be widely used as a moisturizer in the daily chemical industry.
General Information
Chemical & Physical Properties
Safety Information
Synthetic Route
Common Names Propylene Glycol
Structure
CAS No. 57-55-6 Boiling Point (℃) 355.5±25.0 °C
Molecular Weight 76.094 Melting Point (℃) '-60 °C
Appearance Transparent viscous liquid Vapor Density 2.62 (vs air)
HS Code 2905320000 Flash Point (℃) 107.2±0.0 °C
Solubility It can be miscible with water, ethanol, ether, chloroform, acetone and other organic solvents. Although the solubility of hydrocarbons, chlorinated hydrocarbons and oils is small, it is stronger than the solubility of ethylene glycol. Autoignition Temperature (℃) 371
Safety Phrases s24/25
RIDADR NONH for all modes of transport
WGK Germany 1
PPE Eyeshields;Gloves


SYMPTOMS PREVENTION FIRST AID
Inhalation Cough. Sore throat.  Use local exhaust or breathing protection.  Get off site and fresh air. Medical treatment
Skin Redness. Burning sensation. Itching.  Protective gloves.  Remove contaminated clothing and rinse thoroughly with plenty of running water
Eyes Redness. Pain.  Wear safety goggles.  Immediately open the upper and lower eyelids and rinse with running water or normal saline
Ingestion Abdominal pain. Nausea. Vomiting.  Do not eat, drink, or smoke during work. Wash hands before eating.  Give plenty of warm water, induce vomiting, and seek medical attention.
Frequently Asked Questions
1.What is Propylene Glycol?
The scientific name of Propylene Glycol is 1,2-propanediol. There is a chiral carbon atom in the molecule. The racemate is a viscous liquid that is easily hygroscopic and has a slight spicy taste. Missoluble in water, acetone, ethyl acetate, and chloroform, soluble in ether. Soluble in many essential oils, but not miscible with petroleum ether, paraffin, and fats. Stable to heat and light, more stable at low temperatures. Propylene Glycol can be oxidized to acetaldehyde, lactic acid, pyruvate, and acetic acid at high temperatures.

2.What is Propylene Glycol used for?
Used for producing unsaturated resins, polyether polyols, epoxy resins, etc;
Used for organic synthesis, solvents, dehydrating agents, gas chromatography stationary liquids, synthesis of emulsifiers, demulsifiers, etc;
Chemical intermediate acting on the pesticide fungicide phenyl ether metronidazole; Used in the glass paper, plasticizers, and pharmaceutical industry;
The aqueous solution of Propylene Glycol is an effective antifreeze;
This product can be used as a carrier for human pharmaceutical drugs, as well as a granule drug agent, moisturizer, softener, and solvent;
It can also be used as a solvent in the field of veterinary medicine and pesticide;
It can be used in tobacco industry as tobacco essence, tobacco humectant and preservative;
It can be widely used as a moisturizer in the daily chemical industry.

3.Is Propylene Glycol safe?
If Propylene Glycol can be used correctly, it generally does not pose a threat to physical health.
Description of first aid measures:
(1).In all cases of doubt, or when symptoms persist, seek medical attention.
(2).In case ofinhalation:
Not expected to be an inhalation hazard under anticipated conditions ofnormal use ofthis material-Avoid inhalation of hot vapors or extremely high concentrations of aerosols -Remove to fresh air.
-Consult a physicianifnecessary
Skin contact:
-Wash skin with plenty of water
(3). In case of skin contact:
Wash skin with plenty of water
(4). In case of eyes contact:
Flush eyes with water thoroughly and continuously for 15 minutes.

4.How to securely store?
Store in a cool and ventilated warehouse, with a temperature not exceeding 37 ℃ and a relative humidity controlled below 60%. It should be stored separately from oxidants, reducing agents, acids, etc. It is important to avoid mixing and keep the container sealed. Stay away from sparks and heat sources. Prohibit the use of mechanical equipment and tools that are prone to generating sparks. The storage area should be equipped with emergency response equipment for leaks. When stacking and storing, the bottom layer should be placed with a cushion layer, and the stacking height should not exceed 2 meters.

5.How is Propylene Glycol made?
1.The direct hydration method of epoxypropane is a pressurized non catalytic hydrolysis method. It is obtained by direct hydration of epoxy propane and water at 150-160 ℃ and 0.78-0.98 MPa pressure. The reaction product is evaporated and distilled to obtain the final product. 57-55-6 preparation
2. The indirect hydration method of epichlorohydrin is obtained by the indirect hydration of epichlorohydrin and water using sulfuric acid as a catalyst.
3. Direct catalytic oxidation of propylene.
4. Using 1,2-dichloropropane as the raw material, this method has two process routes: first, dichloropropane is directly hydrolyzed into Propylene Glycol in weak alkaline aqueous solution; The second is that dichloropropane reacts with carboxylates to form esters, which are then hydrolyzed into Propylene Glycol.
(1)The direct hydrolysis process involves adding 1,2-dichloropropane, water, sodium bicarbonate, and hexadecyltributylphosphonium bromide to a reactor. The reaction is carried out at 100 ° C and CO2 partial pressure of 1.0 MPa for 18 hours to obtain 80% Propylene Glycol. Control the feeding speed of dichloropropane, that is, the feeding speed is fast at high temperatures and slow at low temperatures. Example: Add 60g of calcium carbonate and 150g of water to a 300ml high-pressure vessel, stir and heat up to 230 ℃, and continuously add dichloropropane at a rate of 0.03g/(min · 100gH2O) for 11.5 hours; Continue stirring at this temperature for 30 minutes, then rapidly cool to room temperature. The yield of Propylene Glycol is about 95%. By controlling the temperature between 130-300 ℃ and changing the feeding rate of dichloropropane accordingly, the yield of Propylene Glycol can reach over 95%.
(2) The two-step hydrolysis process first reacts the raw materials in a kettle reactor. After reaching a certain conversion rate of dichloropropane, it is fed into a piston flow reactor for further reaction, and finally hydrolyzed into Propylene Glycol.
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