Project index requirements: Colorless or light yellow liquid appearance, internal pressure (50±1)℃, MPa ≤ 0.8 Leakage test (50±1)℃, constant temperature water bath no leakage ejection rate (%) ≥ 98.0 ※ Cleaning power ( %) ≥ 85 ※Heat resistance can be maintained at (40±2)℃ for 24h, and can be used normally after returning to room temperature. ※Cold resistance can be maintained at (0±5)℃ for 24h, and can be used normally after returning to room temperature. ※Corrosive (30℃± 2℃, 2h) Appearance of No. 45 steel, grade 0 Corrosion amount, mg ≤ 2