Polyvinyl alcohol, 49-88, partially saponified, 100 g, plastic

Polyvinyl alcohol 49-88 is a partially saponified polymer for laboratory and technical use. It carries CAS number 25213-24-5 and is specified with a molar mass greater than 205 000 g/mol, locating this grade at the high-molecular-weight end of the partially hydrolysed polyvinyl alcohol series. The 49-88 designation describes a defined viscosity and saponification class relevant when elevated molecular weight is needed for viscosity build-up, film strength, or related formulation behaviour in water-borne systems. Partial saponification retains residual acetate functionality that influences dissolution and compatibility, making precise grade selection essential for reproducible results. Laboratories evaluating hydrolysis level against molecular-weight window can use this 49-88 type from manufacturer Carl ROTH as a high-M reference within a structured grade set. The product is supplied as a laboratory chemical with the manufacturer’s molar-mass statement and partially saponified classification, facilitating clear ordering, inventory coding, and documentation in research and process-development environments.

This article is part of Polymers, PEGs & silicones, in Organic chemicals & synthesis reagents.

Key features

• Viscosity (4 %, H2O, 20 °C): 45.0-52.0 mPas
• pH value (4 % in H2O): 5.0-7.0
• Degree of hydrolysis, Mol.-%: 87.0-89.0
• Ash content (as Na2O): ≤0.4 %
• Non volatile matter: ≥95.0 %
• CAS number: 25213-24-5
• Pack sizes: 100 g, 250 g, 1 kg
• Molar mass: >205 000 g/mol
• Type: 49-88, partially saponified
• Technical Information Sheet:
• Safety Data Sheet: