I did a search online and came up with this:
Blue Shield BQ Algaecide
• Alkyl* dimethyl benzyl ammonium chloride *(60% C14, 30% C16, 5% C18, 5% C12) 49.8
• Dialkyl* methyl benzyl ammonium chloride *(60% C14, 30% C16, 5% C18, 5% C12) 0.2
Blue Shield Shock Treatment
• 12-1/2% chlorine...