Polyether L-61 (CAS: 25322-69-4) belongs to the poloxamer class of nonionic polymeric surfactants, with the trade name Pluronic L-61. Its molecular structure is a block copolymer of polypropylene oxide (PPO) and polyethylene oxide (PEO), with a PPO-PEO-PPO triblock configuration. The polypropylene oxide segment is hydrophobic, while the polyethylene oxide segment is hydrophilic.
The naming of Poloxamer 181 follows specific rules: the first two digits "18" multiplied by 100 represent the approximate molecular weight of the polypropylene oxide (PPO) block in the molecule (about 1800 Da), and the last digit "1" multiplied by 10 represents the mass percentage of the polyethylene oxide (PEO) block in the total molecular weight (about 10%). Therefore, this product has a hydrophobic PPO segment as the main body and a low content of hydrophilic PEO, making it a low-foaming surfactant.
| Item | Data | Source |
|---|---|---|
| Chemical Name | Poloxamer 181 / Polyethylene oxide-polypropylene oxide block copolymer | GUOLI Chemical Product Database |
| CAS No. | 25322-69-4 | GUOLI Chemical Product Database |
| Aliases | PPG, Polypropylene glycol, Pluronic L-61 | GUOLI Chemical Product Database |
| Ion Type | Nonionic | GUOLI Chemical Product Database |
| Molecular Structure Characteristics | PPO-PEO-PPO triblock copolymer, PPO about 1800 Da, PEO about 10% | Poloxamer Naming Rules |