(1-Hydroxyethylidene)bis-phosphonic acid, tetrasodium salt (HEDP•Na4 salt)

Phosphonic acid, (1-hydroxyethylidene)bis-, tripotassium salt (HEDP•K3 salt)

1-hydroxyethylidene-1, 1-diphosphonic acid (HEDP)

(1-Hydroxyethylidene)bis-phosphonic acid tetrasodium salt (HEDP•Na4 salt)

(1-Hydroxyethylidene)bis-phosphonic acid, sodium salt (HEDP•Na2 salt)

Proprietary phosphonic acid blend

2-Phosphonobutane-1,2,4-tricarboxylic acid, tetrasodium salt (PBTC•Na4)

2-Phosphonobutane-1,2,4-tricarboxylic acid (PBTC)

2-Phosphonobutane-1,2,4-tricarboxylic acid, tetrasodium salt (PBTC•Na4)

Reaction mass of [[(2-hydroxyethyl)imino] -bis(methylene)]bisphosphonic acid and phosphonic acid, P-[(tetrahydro-2- hydroxy-2-oxido-4H-1,4,2-oxazaphosphorin-4-yl)methyl-, sodium salt (HEMPA•Nax)