FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * ZVI EIREF   2. Issuer Name and Ticker or Trading Symbol CHURCH & DWIGHT CO INC /DE/ [CHD] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Vice President Finance CFO (Last) (First) (Middle) 469 NORTH HARRISON STREET 3. Date of Earliest Transaction (Month/Day/Year) 12/20/2005 (Street) PRINCETON, NJ 08543 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 12/20/2005   M   600 A $ 7.2084 318,570.881 D   Common Stock 12/20/2005   S   600 D $ 32.9583 317,970.881 D   Common Stock 12/21/2005   M   24,150 A $ 7.2084 342,120.881 D   Common Stock 12/21/2005   S   24,150 D $ 32.9846 (1) 317,970.881 D   Common Stock               16,938.503 I Prfit Shring/Saving Plan Trust

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Phantom Stock

$ 0

(2)

08/08/1988

Common Stock

32,737.5063

32,737.5063 (3)

D

Stock Option

$ 9.0834

01/26/2001

01/26/2008

Common Stock

78,600

78,600

D

Stock Option

$ 11.4167

02/24/2003

02/24/2010

Common Stock

37,500

37,500

D

Stock Option

$ 13.8334

05/06/2002

05/06/2009

Common Stock

29,700

29,700

D

Stock Option

$ 16.2034

04/30/2004

04/30/2011

Common Stock

28,950

28,950

D

Stock Option

$ 21.8567

06/16/2006

06/16/2013

Common Stock

34,950

34,950

D

Stock Option

$ 22.3734

06/17/2005

06/17/2012

Common Stock

38,925

38,925

D

Stock Option

$ 29.5

06/14/2007

06/14/2014

Common Stock

27,000

27,000

D

Stock Option

$ 35.29

06/20/2008

06/20/2015

Common Stock

24,600

24,600

D

Stock Option

$ 7.2084

12/20/2005

M

600

11/01/1999

11/01/2006

Common Stock

600

$ 7.2084

48,900

D

Stock Option

$ 7.2084

12/21/2005

M

24,150

11/01/1999

11/01/2006

Common Stock

24,150

$ 7.2084

24,750

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
ZVI EIREF 469 NORTH HARRISON STREET PRINCETON, NJ 08543			Vice President Finance CFO

Signatures

Andrew C. Forsell		12/22/2005
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(3)	Holdings have been adjusted to reflect dividends paid to reporting person under Church & Dwight Co., Inc.'s Deferred Compensation Plan.
(2)	The phantom stock shares were acquired under the Church & Dwight Co., Inc. Deferred Compensation Plan and are to be settled in cash at such time as prescribed by the Plan.
(1)	32.9846 reflects the average sale price of this cashless stock option transaction, which relates to seventeen separate transactions conducted on December 21, 2005 from the same stock option grant of November 11, 1996. The detail for such transactions is as follows, with the number of shares sold preceeding the sale price: 200 at 32.89; 900 at 32.90; 600 at 32.91; 400 at 32.92; 300 at 32.93; 1900 at 32.94; 2300 at 32.95; 600 at 32.96; 700 at 32.97; 2050 at 32.98; 1800 at 32.99; 5400 at 33.00; 3700 at 33.01; 500 at 33.02; 200 at 33.03; 400 at 33.04; 2200 at 33.05.

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