Alps Chemicals Pvt. Ltd. Manufactures Acid Dyes for Wool. Alps Chemicals Pvt. Ltd. Been awarded the ISO 9001:2000, ISO 14000 and ISO 18000 certifications. The Acid Dyes for Wool are available in different grades, they are as follows: Alpanil Yellow 3RL Alpanil Bordeaux B Alpanil Black LD Alpanll Yellow 5RL Alpanil Dark Blue TR Alpanil Fast Yellow GR Alpanil Yellow 2GLN Alpanil Olive BGL Alpanil Fast Orange GEN, etc.