CAS 400-96-4 appears in our catalog under these names: 5-(Fluorosulfonyl)-2-hydroxybenzoic acid 95%, 5-(Fluorosulfonyl)-2-hydroxybenzoic acid, 95%, 95%, 5-(FLUOROSULFONYL)-2-HYDROXYBENZOIC ACID, 95%. Offered by: Ambeed, Chemat, Fluorochem. Available pack sizes: 100mg, 250mg, 1g.