EXHIBIT 12.1



APOGENT TECHNOLOGIES INC.

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

(Dollar amounts in thousands)



|                                          |  |                              |         |                           |      |         |      |   |         |  |      |         |  |   |         |  |   |        
|----------------------------------------- |  | ---------------------------- | ------- | ------------------------- | ---- | ------- | ---- | - | ------- |  | ---- | ------- |  | - | ------- |  | - | -------
|                                          |  | SixMonths EndedMarch 31,2004 |         | Years Ended September 30,
|                                          |  |                              | 2003    |                           | 2002 |         | 2001 |   | 2000    |  | 1999
|Fixed Charges:                            |  |                              |         |                           |      |         |      |   |         |  |      |         |  |   |         |  |   |        
|Interest expense                          |  | $                            | 15,816  |                           | $    | 46,227  |      | $ | 40,737  |  | $    | 48,820  |  | $ | 49,584  |  | $ | 41,228 
|Deferred financing                        |  |                              | 3,012   |                           |      | 4,046   |      |   | 3,461   |  |      | 472     |  |   | 521     |  |   | 224    
|1/3 Rental expense                        |  |                              | 2,532   |                           |      | 5,203   |      |   | 4,374   |  |      | 3,424   |  |   | 2,905   |  |   | 2,235  
|                                          |  |                              |         |                           |      |         |      |   |         |  |      |         |  |   |         |  |   |        
|                                          |  | $                            | 21,360  |                           | $    | 55,476  |      | $ | 48,572  |  | $    | 52,716  |  | $ | 53,010  |  | $ | 43,687 
|Earnings:                                 |  |                              |         |                           |      |         |      |   |         |  |      |         |  |   |         |  |   |        
|Pre tax income from continuing operations |  | $                            | 98,342  |                           | $    | 122,157 |      | $ | 205,311 |  | $    | 163,411 |  | $ | 134,759 |  | $ | 145,750
|Add: Fixed charges                        |  |                              | 21,360  |                           |      | 55,476  |      |   | 48,572  |  |      | 52,716  |  |   | 53,010  |  |   | 43,687 
|Earnings                                  |  |                              | 119,702 |                           |      | 177,633 |      |   | 253,883 |  |      | 216,127 |  |   | 187,769 |  |   | 189,437
|Ratio of Earnings to Fixed Charges        |  |                              | 5.6     |                           |      | 3.2     |      |   | 5.2     |  |      | 4.1     |  |   | 3.5     |  |   | 4.3    
|                                          |  |                              |         |                           |      |         |      |   |         |  |      |         |  |   |         |  |   |        
|Rental Expense                            |  | $                            | 7,595   |                           | $    | 15,608  |      | $ | 13,123  |  | $    | 10,272  |  | $ | 8,716   |  | $ | 6,704  
|                                          |  |                              |         |                           |      |         |      |   |         |  |      |         |  |   |         |  |   |