The polydispersity of this product is tested on a lot-to-lot basis and is listed on the Certificate of Analysis. For example, for lot number BCCH2568, the polydispersity is 1.32 as per the Certificate of Analysis:
https://www.sigmaaldrich.com/certificates/sapfs/PROD/sap/certificate_pdfs/COFA/Q14/71578-BULK-FBCCH2568.pdf
71578
Poly(ethylene glycol) methyl ether
BioUltra, 500
Synonym(s):
Polyethylene glycol, Methoxy poly(ethylene glycol), Polyethylene glycol monomethyl ether, mPEG
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About This Item
Linear Formula:
CH3(OCH2CH2)nOH
CAS Number:
MDL number:
UNSPSC Code:
12162002
PubChem Substance ID:
NACRES:
NA.26
Pricing and availability is not currently available.
Recommended Products
vapor density
>1 (vs air)
Quality Level
vapor pressure
0.05 mmHg ( 20 °C)
description
non-ionic
product line
BioUltra
form
paste
viscous liquid (clear)
mol wt
470-530
impurities
insoluble matters, passes filter test
≤0.005% peroxides (as H2O2)
pH
5.5-7.0 (25 °C, 50 mg/mL in H2O)
mp
20 °C (lit.)
solubility
H2O: 50 mg/mL at 25 °C, clear, colorless
anion traces
chloride (Cl-): ≤50 mg/kg
sulfate (SO42-): ≤50 mg/kg
cation traces
Al: ≤5 mg/kg
As: ≤0.1 mg/kg
Ba: ≤5 mg/kg
Bi: ≤5 mg/kg
Ca: ≤10 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤5 mg/kg
K: ≤200 mg/kg
Li: ≤5 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Mo: ≤5 mg/kg
Na: ≤200 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Sr: ≤5 mg/kg
Zn: ≤5 mg/kg
λ
50 mg/mL in H2O
UV absorption
λ: 260 nm Amax: 0.06
λ: 280 nm Amax: 0.03
functional group
hydroxyl
SMILES string
O(CCO)C
InChI
1S/C3H8O2/c1-5-3-2-4/h4H,2-3H2,1H3
InChI key
XNWFRZJHXBZDAG-UHFFFAOYSA-N
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Storage Class Code
10 - Combustible liquids
WGK
WGK 1
Flash Point(F)
359.6 °F - closed cup
Flash Point(C)
182 °C - closed cup
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
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what is the polydispersity of this mPEG?
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Is your product 71578 PEG MME 500 ?
1 answer-
Yes, this product is a PEG MME (poly(ethylene glycol) methyl ether) with a molecular weight of 500 (specified to be 470-530).
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