| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1131.01 | USD | 20251204 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1116.88 | USD | 20251204 |
| Beijing Yanshan Petrol-Chemical Industry Co., Ltd. | China national standards | MT | 841.19 | USD | 20251204 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 933.09 | USD | 20251204 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1060.33 | USD | 20251204 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 933.09 | USD | 20251204 |
| Shandong Hongyang Chemical Co., Ltd. | China national standards | MT | 909.05 | USD | 20251204 |
| Lihuayi Weiyuan Chemical Co., Ltd. | China national standards | MT | 841.19 | USD | 20251204 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1109.81 | USD | 20251204 |
| Beijing Yanshan Petrol-Chemical Industry Co., Ltd. | China national standards | MT | 1173.43 | USD | 20251204 |