Shanghai Yearn Chemical Science - Tech Co., Ltd.

Shanghai Yearn Chemical Science - Tech Co., Ltd. is based in Estonia and lists PVP K30 and PVP K90 on Global Trade Plaza. The company lists 2021 as its year of establishment. PVP K30 is a white powder with chemical formula (C6H9NO)n, molecular weight 111.143, density 1.69 g/cm3, melting point 130, boiling point 90-93, content 98%, K value 30.24, pH 3.63, vinylpyrrolidone 0.01%, burning residue 0.01%, nitrogen content 11.8%, aldehyde (as acetaldehyde) 0.02%, and heavy metals (as lead) ppm. PVP K90 is a white powder with chemical formula (C6H9NO)n, molecular weight 111.143, density 1.69 g/cm3, melting point 130, boiling point 90-93, K value 92.5, moisture 2.8%, pH value (5% in water) 5.8, 1-vinylpyrrolidin-2-one 0.0006%, residue on ignition 0.02%, nitrogen content 12.2%, aldehydes (as acetaldehyde) 0.00023%, and heavy metals (as Pb) ppm. Buyers can send an enquiry through Global Trade Plaza.