| Item | Specification | Test Method |
Original solution | Appearance | Light colorless transparent solution | Visual inspection |
| Density (g/ml) | 1.05 ± 0.05 | GB/T2540 |
5% Diluted Solution | Appearance | Light colorless transparent solution | Visual inspection |
| Foam Property (ml) | 10 ml (2 min) | Graduated cylinder method |
| Rust Prevention | Grade 1 Cast Iron A | GB/T6144-85 |
| pH Value | 8.5–9.6 | pH meter |