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Polyethylene glycol monomethyl ether 550
Applications
- Crystallization grade Polyethylene glycol monomethyl ether 550 for formulating screens or for optimization
Description
Polyethylene glycol monomethyl ether 550
Synonyms: Methoxypolyethylene glycol, mono-Methyl polyethylene glycol, Methoxy poly(ethylene glycol), PEG MME 550, MPEG
CH3(CH2CH2O)nOH
Average Mn ~550
CAS Number [9004-74-4]
EC Number 215-801-2
RTECS PE8271000
MDL Number MFCD00084416
Purity ≥100%
Melting Point (Starting Material) 20.0°C (lit.)
Aldehyde None detected
Peroxide None detected
Measured Conductivity Range: 0.0 - 1.0 µS/cm at 25°C
Measured Refractive Index Range: 1.46185 - 1.46361 at 20°C
May become highly viscous, develop amorphous, crystalline precipitate, or take on a gel like consistency at temperatures below 20 degrees Celsius. Warm product to 60 degrees Celsius for up to 24 hours, mix well, to dissolve amorphous, crystalline precipitate.
Support Material(s)
HR2-611 Polyethylene glycol monomethyl ether 550 SDSCertificate Of Analysis
References
1. Poly(ethylene) glycol monomethyl ethers - an alternative to poly(ethylene) glycols in protein crystallization. A. M. Brzozowski and S. P. Tolley. Acta Cryst. (1994). D50, 466-468.
2. Crystal structure of ethylbenzene dehydrogenase from Aromatoleum aromaticum. Daniel P. Kloer, Corina Hagel, Johann Heider and Gerog E. Schulz. Structure 2006 Volume 14 Number 9, 1377-1388.