Description
Polyethylene glycol 2000, ROTIPURAN®, is a polyethylene glycol grade with CAS number 25322-68-3 and EG nr. 500-038-2. The stated molar-mass range is 1800–2200 g/mol, the density is 1,2 g/cm³ and the flash point lies between 240 and 270 °C. This article is of the ROTIPURAN® quality. Polyethylene glycol 2000 is a polymeric glycol whose average molecular weight is defined by the 1800–2200 g/mol window; the density of 1,2 g/cm³ supports conversion between mass and volume from the published figure. The flash-point interval of 240 to 270 °C is recorded for thermal handling of the bulk material. 500-038-2 and the 1800–2200 g/mol range together on one labelled pack. Laboratories that specify Polyethylene glycol 2000 at this molar-mass band can draw on the published density of 1,2 g/cm³ and the 240–270 °C flash point when relating mass, volume and thermal limits for.
This article belongs on Analytical grade solvents (p.a.), in Solvents.
Key features
- Appearance (20 °C): solid, scaly
- Average molar mass: 1800-2200 g/mol
- Colour count (APHA, 25 % in H2O): ≤30
- Hydroxyl value: 51-62 mg KOH/g
- Solidifying point: 48-52 °C
- pH value (5 % in H2O): 4.5-7.5
- Water (KF): ≤1.0 %
- Viscosity (20 °C, 50 % in H2O): 50-58 mPa s
- Ethylene and diethylene glycol: ≤0.20 %
- Sulphated ash: ≤0.1 %
- CAS number: 25322-68-3
- Pack sizes: 1 kg, 5 kg, 500 g
- EG nr.: 500-038-2
- Molar mass: 1800-2200 g/mol
- Density: 1,2 g/cm³
- Flash point: 240 to 270 °C
- Technical Information Sheet:
- Safety Data Sheet:
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Questions about Polyethylene glycol 2000, ROTIPURAN®, 500 g, plastic
What is this article?
Polyethylene glycol 2000, ROTIPURAN®, 500 g, plastic is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Analytical grade solvents (p.a.), inside Solvents, in Lab chemicals.
An analytical-grade solvent, often marked p.a., has impurity limits tight enough for classical analysis and for preparing reagents. It is not automatically low enough in UV absorbance for HPLC, and it is not dry enough for a water-sensitive reaction. The grade is the purchase.
A solvent dissolves. The grade says which impurities are low enough for the method. Analytical grade is the ordinary pure solvent. HPLC and LC-MS grades limit the absorbance and the ions that would become peaks or background. A dry solvent has had water removed. A deuterated solvent is for NMR, where the hydrogen signal would otherwise drown the sample. Technical grade is for cleaning and for synthesis that does not need a chromatogram. Identity is on PubChem. Names follow IUPAC. Hazards follow ECHA, the CLP Regulation and REACH.
Which category should I open next?
The category is Solvents. The sub-category is Analytical grade solvents (p.a.). The catalogue is Lab chemicals.
Shelves beside this one are HPLC & LC-MS grade solvents, Dry & deuterated solvents (NMR, synthesis), Technical & synthesis grade solvents and Green & alternative solvents.
What should I check before I order?
The technical information on this page is the manufacturer's sheet. Read that, not a rewritten specification.
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