| 3/20/2018 | 281122000000 | SILICON DIOXIDE (SILICA GEL)
| 20000 | Kilogram | 31642.4 | N/A | AYDIN KIMYA SANAYI VE TIC.A.S. |
| 3/19/2018 | 281122000000 | SILICON DIOXIDE (SILICA FUME)
| 25200 | Kilogram | 7822.01 | N/A | ÖZGÜR ATERMIT SANAYIVE TICARET A.S. |
| 3/7/2018 | 281122000000 | "SILICA JINSIL 700 (SILISIUM DIOXIDE) (BASIC QUANTITY FOR SATISA. 15,12 MT ..)"
| 15120 | Kilogram | 12536.64 | N/A | ELKIM KAUÇUK VE KIMYA SAN.TIC.LTD.STI. |
| 3/7/2018 | 281122000000 | "SILICA JINSIL 700 (SILISIUM DIOXIDE) (BASIC QUANTITY FOR SATISA. 15,12 MT.)"
| 15120 | Kilogram | 12531.44 | N/A | ELKIM KAUÇUK VE KIMYA SAN.TIC.LTD.STI. |
| 3/6/2018 | 281122000000 | SILICA FUME (SILISIUM DIOXIDE)
| 25200 | Kilogram | 8047.96 | N/A | ÖZGÜR ATERMIT SANAYIVE TICARET A.S. |
| 3/1/2024 | 281122000000 | SILICA-SILICIUM DIOXIDE; | 15 | KILOGRAM | 1528 | N/A | ZİRVE POLİMER TEKSTİL VE GIDA MADDELERİ İTHALAT İHRACAT SANAYİ TİCARET LİMİTED ŞİRKETİ |
| 3/5/2024 | 281122000000 | SILICON DIOXIDE (MI-CRO SILICA) | 72000 | KILOGRAM | 34181 | N/A | HAZNEDAR DURER REFRAKTER MALZEMELERİ SANAYİ VE TİCARET ANONİM ŞİRKETİ |
| 3/8/2024 | 281122000000 | ANTI CORROSIVE PIGMENT LM-50 / SILICIUM / DIOXIDE | 100 | KILOGRAM | 798 | N/A | RAVAGO PETROKİMYA ÜRETİM ANONİM ŞİRKETİ |
| 3/7/2024 | 281122000000 | FUMED SILICA**-OTHER INORGANIC OXYGENATED COMPOUNDS OF NAMETALS: --SILIGIUM DIOXIDE+ | 4000 | KILOGRAM | 12160 | N/A | FİXA YAPI KİMYASALLARI SANAYİ VE TİCARET LİMİTED ŞİRKETİ |
| 3/12/2024 | 281122000000 | MATTING AGENT TSA-260L / TSA-270L (CYLI/SYUM DIOXIDE) (IN SOLID STATE) | 11200 | KILOGRAM | 40480 | N/A | SAR KİMYA SANAYİ MÜHENDİSLİK DANIŞMANLIK VE TİCARET ANONİM ŞİRKETİ |