| Vendor | Spec | Unit | Price | Currency | Date |
| Tongdai Haijing NATURAL SODA Co., Ltd. | China national standards | MT | 169.0 | USD | 20251013 |
| Tongdai Haijing NATURAL SODA Co., Ltd. | China national standards | MT | 169.0 | USD | 20251013 |
| Tongdai Haijing NATURAL SODA Co., Ltd. | China national standards | MT | 168.9 | USD | 20251011 |
| Tongdai Haijing NATURAL SODA Co., Ltd. | China national standards | MT | 168.9 | USD | 20251011 |
| Tongdai Haijing NATURAL SODA Co., Ltd. | China national standards | MT | 168.9 | USD | 20251010 |
| Tongdai Haijing NATURAL SODA Co., Ltd. | China national standards | MT | 168.9 | USD | 20251010 |
| Tongdai Haijing NATURAL SODA Co., Ltd. | China national standards | MT | 168.77 | USD | 20251009 |
| Tongdai Haijing NATURAL SODA Co., Ltd. | China national standards | MT | 168.88 | USD | 20250930 |
| Tongdai Haijing NATURAL SODA Co., Ltd. | China national standards | MT | 168.88 | USD | 20250930 |
| Tongdai Haijing NATURAL SODA Co., Ltd. | China national standards | MT | 168.8 | USD | 20250929 |