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Acidity (in terms of acetic acid), %, no more than 0,003 Alkalinity (in terms of dimethylamine), %,mno more thanm0,0001 Water content according to Karl Fischer method, %,mno more thanm0,05 Refractive index at 25 °С 1,4350-1,4380 Main substance content, %, not less 99,9 Density at 20°C, g/cm3 0,935-0,945 Color on ARNA scale (5% aqueous solution) 0-5,0 Specific electrical conductivity at 25 °С, μS/cm, not more than 0,05 Methanol content, %, not more 0,0008 Content of dimethylformamide, %, not more than 0,015