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Neutral red

Country/Region china
Company WHC International CO.,LTD
Categories Acid Red Dye
ICP License Issued by the Chinese Ministry
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    Neutral red

    Neutral red Indicatorback>>

    Neutral red


    Methyl red (2-(N,N-dimethyl-4-aminophenyl) azobenzenecarboxylic acid), also called C.I. Acid Red 2, is an indicator dye that turns red in acidic solutions. It is an azo dye, and is a dark red crystalline powder. Methyl red is a pH indicator; it is red in pH under 4.4, yellow in pH over 6.2, and orange in between, with a pKa of 5.1. Murexide and methyl red are investigated as promising enhancers of sonochemical destruction of chlorinated hydrocarbon pollutants.Methyl red is classed by the IARC in group 3 - unclassified as to carcinogenic potential in humans.
    Synonym: 2-(4-Dimethylaminophenylazo)benzoic acid, 4-Dimethylaminoazobenzene-2′-carboxylic acid, Acid Red 2

    Grade:AR Grade

    Purity:99% min

    CAS Number :493-52-7

    EC Number :209-035-8

    Molecular Formula:C15H17ClN4

    Technical Requirements:


    Neutral red

    AppearanceRed-brown or Purple Crystal Powder
    PH Range4.5 - 6.2, red to yellow
    Ignition Residue (w/%)0.2% max
    Loss on Drying (w/%)1.0% max
    Solubility in EthanolQualified


    In microbiology, it is used in the MacConkey agar to differentiate bacteria for lactose fermentation.
    Neutral red can be used as a vital stain. Live cells incorporate neutral red into their lysosomes. As cells begin to die, their ability to incorporate neutral red diminishes. Thus, loss of neutral red uptake corresponds to loss of cell viability.
    It is also used to stain cell cultures for plate titration of viruses.
    Neutral red is added to some growth media for bacterial and cell cultures. It usually is available as a chloride salt.
    Neutral red acts as a pH indicator, changing from red to yellow between pH 6.8 and 8.0.
    Useful as an indicator for preparing neutral red paper, and as a biological stain.

    Packing:25g/bottle or according to your requirement.

    Question 1:How to buy the Neutral red?

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    Question 2:Where to buy Neutral red powder

    The easies and the most convenient way to buy Neutral red is from WHC International CO.,LTD.We have best supplier chain team, best technical team and best production team. From raw material to production, we strictly control every procedure. When you want authentic and high quality Neutral red, buy it from,or send email to

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    Buying Neutral red online can saves your time, effort and money since, the best effective way to buy Neutral red is through you are secure that your transactions safety and under your control.

    Question 4:what is the delivery wey for Neutral red shipment

    for small quantity(<500kg) we wiil delivery the goods by air or by Express suche as FEDEX or DHL. Your order will be deliveried to your office on time. for more than 1000kg,we will delivery the goods by sea.

    when you want to buy Neutral red , please contact us by following way

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