Talk:Malachite green

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The CAS lookup link at NIST does not seem to work; either the CAS numbers are wrong or NIST does not have it in its database.

Cas numbers[edit]

I made a search on Beilstein with a structural search. The compound was known as "MalachitGruen" with CAS number: 10309-95-2. However, the compound was not on the CAS database either. I removed the external links because they were broken and no longer relevant. The naming system of the forms of malachite green was based on the journal articles in the sources.

IUPAC name[edit]

The IUPAC name quoted in the existing article doesn't make sense as stated because it doesn't account for the methylene moiety, so I checked on it. According to the Merck Index, the correct Chemical Abstracts Service (CAS)name for malachite green, which seems more logical to me, is:

N-[4-[[4-(Dimethylamino)-phenyl]phenylmethylene]-2,5-cyclohexadien-1-ylidene]-N-methylmethanaminium chloride

Merck also list the CAS number as: [569-64-2], which confirms that shown in the article.

A citation needed for Leucomalachite green as a presumptive test for blood.[edit]

This page talks about the standard method of using leucomalachite green to detect blood. Specifically, you can't spray it around like you can luminol - the peroxide has to be added to the swab as a separate step. I was just watching a forensic files where they misused it.

The above is a lab SOP from a US Government site called "The DNA Initiative" (Site Root available through I am going to try and add this as an external link and as a citation. If I am unable to do so properly perhaps someone else can, using this information. —Preceding unsigned comment added by Simicich (talkcontribs) 21:01, 8 July 2010 (UTC) Simicich (talk) 21:03, 8 July 2010 (UTC)