EXHIBIT 31.1

CERTIFICATION PURSUANT TO

SECTION 302 OF THE

SARBANES-OXLEY ACT OF 2002

I, James W.P. Reid-Anderson, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Dade Behring Holdings, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of Dade Behring Holdings, Inc. as of, and for, the periods presented in this report;

4.Dade Behring Holdings, Inc.’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for Dade Behring Holdings, Inc. and have:

a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to Dade Behring Holdings, Inc., including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c)Evaluated the effectiveness of Dade Behring Holdings, Inc.’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d)Disclosed in this report any change in Dade Behring Holdings, Inc.’s internal control over financial reporting that occurred during Dade Behring Holdings, Inc.’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, Dade Behring Holdings, Inc.’s internal control over financial reporting; and

5.Dade Behring Holdings, Inc.’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to Dade Behring Holdings, Inc.’s auditors and the audit committee of Dade Behring Holdings, Inc.’s board of directors (or persons performing the equivalent functions):

a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect Dade Behring Holdings, Inc.’s ability to record, process, summarize and report financial information; and

b)Any fraud, whether or not material, that involves management or other employees who have a significant role in Dade Behring Holdings, Inc.’s internal control over financial reporting.

	/s/ James W.P. Reid-Anderson
Date: November 9, 2005	James W.P. Reid-Anderson
	Chairman of the Board, President and Chief Executive Officer