| sigma aldrich certificate of analysis | 0.84 | 0.5 | 6687 | 37 | 35 |
| sigma aldrich certificate of analysis search | 0.15 | 0.2 | 5136 | 44 | 98 |
| sigma certificate of analysis search | 0.31 | 0.6 | 6960 | 36 | 91 |
| sigma certificate of analysis | 0.87 | 1 | 9795 | 29 | 70 |
| sigma aldrich certificate search | 0.23 | 0.4 | 8119 | 32 | 25 |
| sigma aldrich iso certificate | 0.24 | 0.3 | 5407 | 29 | 20 |
| coa sigma aldrich certificate | 1.25 | 0.7 | 3649 | 29 | 67 |
| sigma aldrich certificati analisi | 1.74 | 0.9 | 439 | 33 | 51 |
| sigma-aldrich certificate of origin | 0.55 | 0.4 | 4105 | 35 | 84 |
| sigma aldrich official website | 0.42 | 1 | 4215 | 30 | 18 |
| sigma aldrich chemical search | 0.55 | 0.9 | 7046 | 29 | 10 |
| sigma aldrich chemical website | 1.08 | 0.2 | 4980 | 30 | 95 |
| sigma aldrich usa website | 1.58 | 0.1 | 8097 | 25 | 42 |
| certificato analisi sigma aldrich | 1.73 | 0.4 | 138 | 33 | 33 |
| sigma aldrich home page | 0.35 | 0.7 | 8560 | 23 | 82 |
| sigma-aldrich coa search | 1.24 | 0.7 | 5464 | 24 | 52 |
| sigma-aldrich website | 1.44 | 0.8 | 9376 | 21 | 73 |
| sigma/aldrich | 1.42 | 0.9 | 2974 | 13 | 83 |
