... -Benzotriazole 99.8%, --metal's slow corrosion water treatment chemical 2) low poison, LD50 for small mouse is ... hydraulic oil,brake oil,transformer's oil),emugent,water stabilizer,the additive for high molecular materials'( ... hydraulic oil,brake oil,transformer's oil),emugent,water stabilizer,the additive for high molecular materials'( ... 99.8%, --metal's slow corrosion water treatment chemical