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S.NO. SPECIFICATION ANALYTICAL VALUE Regular Grade Special Grade 1 Description Clear colourless liquid Clear colourless liquid 2 Miscibility Miscible with Methanol Miscible with Methanol 3 Assay % (w/w) 29.0 – 31.0 29.0 – 31.0 4 NaOH & Na2CO3 as H2O (Free Alkali) 0.20 % Max. 0.05 % Max. 5 NaOH & Na2CO3 as NaOH (Free Alkali) 0.44 % Max. 0.11 % Max.