-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 Mde2sKi9L5tB9/PCRk19ygw0I2WVy/qeBTOSUpW9R9PtKcifxbOO+DWILQnsPh7I
 hT6vKSfIAMzZCMmxUEBFsQ==

<SEC-DOCUMENT>0000890163-07-000163.txt : 20070228
<SEC-HEADER>0000890163-07-000163.hdr.sgml : 20070228
<ACCEPTANCE-DATETIME>20070228115758
ACCESSION NUMBER:		0000890163-07-000163
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20070220
FILED AS OF DATE:		20070228
DATE AS OF CHANGE:		20070228

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PIPEX PHARMACEUTICALS, INC.
		CENTRAL INDEX KEY:			0000894158
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				133808303
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		3985 RESEARCH PARK DRIVE
		CITY:			ANN ARBOR
		STATE:			MI
		ZIP:			48108
		BUSINESS PHONE:		734-332-7800

	MAIL ADDRESS:	
		STREET 1:		3985 RESEARCH PARK DRIVE
		CITY:			ANN ARBOR
		STATE:			MI
		ZIP:			48108

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SHEFFIELD PHARMACEUTICALS INC
		DATE OF NAME CHANGE:	19970730

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SHEFFIELD MEDICAL TECHNOLOGIES INC
		DATE OF NAME CHANGE:	19940606

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			KUO JAMES S
		CENTRAL INDEX KEY:			0001050951

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12584
		FILM NUMBER:		07656048

	BUSINESS ADDRESS:	
		STREET 1:		DISCOVERY LABORATORIES INC
		STREET 2:		509 MADISON AVE 14TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
		BUSINESS PHONE:		2122234504

	MAIL ADDRESS:	
		STREET 2:		509 MADISON AVE 14TH FL
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>s11-7151a_ex.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2007-02-20</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000894158</issuerCik>
        <issuerName>PIPEX PHARMACEUTICALS, INC.</issuerName>
        <issuerTradingSymbol>PPXP</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001050951</rptOwnerCik>
            <rptOwnerName>KUO JAMES S</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O 3985 RESEARCH PARK DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ANN ARBOR</rptOwnerCity>
            <rptOwnerState>MI</rptOwnerState>
            <rptOwnerZipCode>48108</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>1.29</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2007-02-20</value>
            </exerciseDate>
            <expirationDate>
                <value>2017-02-19</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>75000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <ownerSignature>
        <signatureName>/s/ James S. Kuo</signatureName>
        <signatureDate>2007-02-28</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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