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Propylene Glycol /PG / MPG, USP grade, food grade, industry grade
Products Specification
| Specification | ||
| Product Name: | Propylene Glycol (Monopropylene Glycol) | |
| CAS NO.: | 57-55-6 | |
| Items | Unit | Specification |
| Color alpha color | - | ≤10.0 |
| Moisture | - | ≤0.2 |
| Specific gravity | 25/25℃ | 1.035~1.039 |
| Refractive index | 25℃ | 1.431~1.435 |
| Distillation range (L) | ℃ | 184.0~189.0 |
| Distillation range (U) | - | 184.0~189.0 |
| Distillation volume VOL | % | ≥95.0 |
| Identification | - | Conforms |
| Acidity 0.1N NAOH ML | - | ≤0.05 |
| Chloride weight | % | ≤0.007 |
| Sulfate | - | ≤0.006 |
| Heavy metals | ppm | ≤5 |
| Reside on Ignition MG | - | ≤2.5 |
| Organic volatile impurity chloroform(µG/G) | - | ≤60 |
| Organic volatile impurity 1.4 dioxane (µG/G) | - | ≤380 |
| Organic volatile impurity methylene chloride (µG/G) | - | ≤600 |
| Organic volatile impurity trichloroethylene (µG/G) | - | ≤80 |
| Assay GLC | % | ≥99.5 |
| Conclusion: | The Product complies with standard FCC/USP grade. | |
| Package: | 215kg/drum,1000kg/IBC, flexibag. | |
| Storage | Store in cool, dry and clean places. | |
Product introduction
1. Chemical Properties
Molecular Formula: C₃H₈O₂
Structural Formula: CH₃-CH(OH)-CH₂OH
Boiling Point: 188.2°C
Melting Point: -59°C
Solubility: Easily soluble in water, ethanol, acetone, and other polar solvents.
Hygroscopicity: Strong hygroscopic properties, capable of absorbing moisture from the air.
2. Main Applications
(1) Food and Pharmaceutical Industries
Food Additive: Used as a humectant, stabilizer, and solvent in beverages, baked goods, condiments, etc.
Pharmaceutical Excipient: Used as a solvent, stabilizer, or thickener in drug formulations, commonly found in oral liquids, injections, and topical ointments.
(2) Cosmetics and Personal Care Products
Humectant: Used in skincare products, shampoos, toothpaste, etc., to help retain moisture.
Solvent: Used to dissolve fragrances, colorants, and other active ingredients.
(3) Industrial Applications
Antifreeze: Used in automotive coolant, aircraft de-icing fluids, etc.
Solvent: Used in paints, inks, cleaning agents, etc.
Tobacco Industry: Used as a tobacco humectant to prevent drying.
(4) E-cigarette Industry
E-liquid Base Component: Mixed with glycerin as a carrier for e-liquids, aiding in vaporization and delivery of nicotine and flavors.
3. Safety
Low Toxicity: Propylene glycol is recognized as a safe food additive by the U.S. Food and Drug Administration (FDA) and the World Health Organization (WHO).
Skin Irritation: Generally non-irritating to the skin, but high concentrations or prolonged exposure may cause mild irritation in sensitive individuals.
Inhalation Safety: When used in e-cigarettes, it may produce small amounts of harmful substances at high temperatures, but the risk is low under normal usage conditions.
4. Environmental Friendliness
Propylene glycol is biodegradable and has a relatively low environmental impact, but large-scale discharge into water bodies should still be avoided.
5. Precautions
Although propylene glycol is considered safe, excessive intake or exposure may cause discomfort such as headaches or nausea.
Individuals allergic to propylene glycol should avoid products containing this ingredient.