GlycerolCAS#56-81-5
1. Exceptional Hygroscopicity & Moisture Retention：
Highly hygroscopic, it absorbs water from the air, making it ideal for moisturizing in cosmetics, pharmaceuticals, and food preservation without altering pH (5.5–8).
2. High Thermal Stability & Safety：
Stable up to 290°C, low flammability (flash point 160°C), and low toxicity (oral LD₅₀ >20 mL/kg in rats), suitable for high-temperature processes.
3. Sustainable Utility：
Derived from biodiesel byproducts, it’s cost-effective in agriculture (livestock feed), medicine (enemas), and eco-friendly antifreeze, reducing waste and resource use.
Glycerin, also known as glycerol, is a colorless, odorless, sweet-tasting viscous liquid in its pure form. It has a boiling point of 290°C, a melting point of 17.9°C, and a relative density of 1.2613. This compound is completely soluble in water in all proportions, and anhydrous glycerin exhibits strong hygroscopic properties.
Melting point | 20 °C(lit.) |
Boiling point | 290 °C |
density | 1.25 g/mL(lit.) |
vapor density | 3.1 (vs air) |
vapor pressure | <1 mm Hg ( 20 °C) |
refractive index | n20/D 1.474(lit.) |
FEMA | 2525 | GLYCEROL |
Fp | 320 °F |
storage temp. | Store at +5°C to +30°C. |
solubility | H2O: 5 M at 20 °C, clear, colorless |
pka | 14.15(at 25℃) |
form | Viscous Liquid |
color | APHA: ≤10 |
Specific Gravity | 1.265 (15/15℃)1.262 |
Odor | Odorless. |
PH Range | 5.5 - 8 |
PH | 5.5-8 (25℃, 5M in H2O) |
explosive limit | 2.6-11.3%(V) |
Odor Type | odorless |
biological source | synthetic (organic) |
Water Solubility | >500 g/L (20 ºC) |
Sensitive | Hygroscopic |
λmax | λ: 260 nm Amax: 0.05 |
Merck | 14,4484 |
JECFA Number | 909 |
BRN | 635685 |
Dielectric constant | 47.0（Ambient） |
Exposure limits | OSHA: TWA 15 mg/m3; TWA 5 mg/m3 |
Stability: | Stable. Incompatible with perchloric acid, lead oxide, acetic anhydride, nitrobenzene, chlorine, peroxides, strong acids, strong bases. Combustible. |
InChIKey | PEDCQBHIVMGVHV-UHFFFAOYSA-N |
LogP | -2.32 |
Surface tension | 64mN/m at 20°C |
CAS DataBase Reference | 56-81-5(CAS DataBase Reference) |
NIST Chemistry Reference | 1,2,3-Propanetriol(56-81-5) |
EPA Substance Registry System | Glycerine (56-81-5) |
Absorption | ≤0.02 at 280nm in H2O at 0.5M |
Safety Information
Hazard Codes | F,Xn |
Risk Statements | 36-20/21/22-11 |
Safety Statements | 24/25-39-26 |
RIDADR | UN 1282 3/PG 2 |
WGK Germany | 1 |
RTECS | MA8050000 |
F | 3 |
Autoignition Temperature | 698 °F |
TSCA | Yes |
HS Code | 29054500 |
Hazardous Substances Data | 56-81-5(Hazardous Substances Data) |
Toxicity | LD50 in rats (ml/kg): >20 orally; 4.4 i.v. (Bartsch) |
