Polyethylene glycol , averageMn300 , 25322-68-3
Synonym(s):
PEG;PEO;Poly(ethylene glycol);0;0
CAS NO.：25322-68-3
Empirical Formula: N/A
Molecular Weight: 0
MDL number: MFCD00081839
EINECS: 500-038-2
| Pack Size | Price | Stock | Quantity |
| 500G | RMB36.80 | In Stock |
|
| 1kg | RMB63.20 | In Stock |
|
| 5KG | RMB281.60 | In Stock |
|
| others | Enquire |
PRODUCT Properties
| Melting point: | 64-66 °C |
| Boiling point: | >250°C |
| Tg | -67 |
| Density | 1.27 g/mL at 25 °C |
| vapor density | >1 (vs air) |
| vapor pressure | <0.01 mm Hg ( 20 °C) |
| refractive index | n |
| Flash point: | 270 °C |
| storage temp. | 2-8°C |
| solubility | H2O: 50 mg/mL, clear, colorless |
| form | waxy solid |
| color | White to very pale yellow |
| Specific Gravity | 1.128 |
| PH | 5.5-7.0 (25℃, 50mg/mL in H2O) |
| Water Solubility | Soluble in water. |
| Sensitive | Hygroscopic |
| λmax | λ: 260 nm Amax: 0.6 λ: 280 nm Amax: 0.3 |
| Merck | 14,7568 |
| Stability: | Stable. Incompatible with strong oxidizing agents. |
| LogP | -0.698 at 25℃ |
Description and Uses
Polyethylene glycols are a family of linear polymers formed by a base-catalyzed condensation reaction with repeating ethylene oxide units being added to ethylene. The molecular formula is (C2H4O)multH2O where mult denotes the average number of oxyethylene groups. The molecular weight can range from 200 to several million corresponding to the number of oxyethylene groups. The higher-molecular-weight materials (100 000 to 5 000 000) are also referred to as polyethylene oxides. The average molecular weight of any specific polyethylene glycol product falls within quite narrow limits (°5%). The number of ethylene oxide units or their approximate molecular weight (e.g., PEG-4 or PEG-200) commonly designates the nomenclature of specific polyethylene glycols. Polyethylene glycols with amolecular weight less than 600 are liquid, whereas those of molecular weight 1000 and above are solid. These materials are nonvolatile, water-soluble, tasteless, and odorless. They are miscible with water, alcohols, esters, ketones, aromatic solvents, and chlorinated hydrocarbons, but immiscible with alkanes, paraffins, waxes, and ethers.
Used in conjunction with carbon black to form a conductive composite.1 Polymer nanospheres of poly(ethylene glycol) were used for drug delivery.2
Safety
| Symbol(GHS) |    GHS06,GHS08,GHS09 |
| Signal word | Danger |
| Hazard statements | H302-H311-H373-H411 |
| Precautionary statements | P273-P280-P301+P312+P330-P302+P352+P312-P391-P501 |
| Hazard Codes | Xi,T |
| Risk Statements | 36/38-52/53-33-23/24/25 |
| Safety Statements | 26-36-24/25-61-45-36/37 |
| WGK Germany | 3 |
| RTECS | TQ4110000 |
| F | 3-9 |
| Autoignition Temperature | 581 °F |
| Hazard Note | Harmful |
| TSCA | Yes |
| HS Code | 39072011 |
| Toxicity | LD50 orally in Rabbit: 28000 mg/kg LD50 dermal Rabbit > 20000 mg/kg |
