... molecular weight: 3500-4500 PEG200,300,400,4000,6000,8000,20000 Polyethylene glycol(PEG) 4000Average molecular ... weight: 3500-4500PEG200,300,400,4000,6000,8000,20000Appearance: White solid powder Freezing point: ... deeper than 2 standard solution Viscosity: 6.0-9.0 pH value: 5-7 Ignition Residue: ≤ 0.2 Storage ... -4846007Fax: 0086-551-4846082 Polyethylene glycol(PEG) 4000