Buy Methanol – ACS grade in 2.5 L from Advent Chembio. Methanol ACS has 2.5 L at ₹965 (₹386/L), the lowest unit rate among the listed pack sizes. Grade: ACS. CAS Number: 67-56-1. Product Code: 91631. HSN: 29051100. GST: 18%. Brand: Advent Chembio.