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lawsone

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Origin: China

Cas No: 83-72-7

Specification: 99%min

Min order Quantity: 1 /kg

Supply Ability: 100 mt/month

Lead time: 7 days for OEM, 3 days for ready goods

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  • Products Specification
  • Product Description

  • Quick Details

    CAS No.:
    83-72-7
    Other Names:
    2-Hydroxy-1,4-naphoquinone
    MF:
    C10H6O3
    EINECS No.:
    201-496-3
    Place of Origin:
    Shanghai, China
    Type:
    Pharmaceutical Intermediates
    Purity:
    99%MIN
    Brand Name:
    XINGLU
    Model Number:
    XL-RL092
    Application:
    organic intermediates
    Appearance:
    Yellow Powder

    Packaging&Delivery

    Packaging Details
    25kgs/drum
    Port
    China main port
    Lead Time:
    Quantity(Kilograms)1 - 5051 - 500501 - 1000>1000
    Est. Time(days)51020To be negotiated

  • Property

    CAS No.: 83-72-7 Formula: C10H6O3 Molecular Weight: 174.15300

    Description

    Lawsone (2-hydroxy-1,4-naphthoquinone), also known as hennotannic acid, is a red-orange dye present in the leaves of the henna plant (Lawsonia inermis) as well as in the flower of water hyacinth (Eichhornia crassipes). Humans have used henna extracts containing lawsone as hair and skin dyes for more than 5000 years. Lawsone reacts chemically with the protein known as keratin in skin and hair, in a process known as Michael addition, resulting in a strong permanent stain that lasts until the skin or hair is shed. Lawsone strongly absorbs UV light, and aqueous extracts can be effective sunless tanning and sunscreens. Chemically, lawsone is similar to juglone, which is found in walnuts.
    Lawone isolation from Lawsonia Inermis can be difficult due to its easily biodegradeable nature.

    Basic Info

    Chemical Name lawsone
    Synonyms

    1,4-Naphthalenedione, 2-hydroxy-;
    2-Hydroxy-p-naphthoquinone;
    2-Hydroxy-1,4-naphoquinone;

    CAS No. 83-72-7
    Molecular Formula C10H6O3
    Molecular Weight 174.15300
    PSA 54.37000
    LogP 1.50750

    Properties

    Appearance & Physical State White cubic crystals
    Density 1.46 g/cm3 (25ºC)
    Boiling Point 339.908ºC at 760 mmHg
    Melting Point 192-195ºC
    Water Solubility 2 g/L (20 ºC)
    Stability Stable. Combustible. Incompatible with strong oxidizing agents.
    Storage Condition Keep tightly closed. Store in a cool dry place.

    Safety Info

    RTECS QL8200000
    Safety Statements S26-S36/37/39
    HS Code 2914690090
    WGK Germany 3
    Packing Group II
    Risk Statements R22; R36; R68
    Hazard Codes Xn

    Synthesis Route

    Sulfuric acid+2-(4-nitroanilino)naphthalene-1,4-dione→lawsone+4-Nitroaniline
    2-(4-bromophenyl)amino-1,4-naphthoquinone→lawsone+4-Bromoaniline
    1,3-Dihydroxynaphthalene→lawsone

    Precursor

    naphthalene-1,2-diol
    methyl 1,4-dihydro-1,4-dioxo-3-(1-pyrrolidinyl)-2-naphthoate
    1,3-Dihydroxynaphthalene
    2-hydroxy-3-iodo-1,4-naphthoquinone

    Downstream Product

    3-hept-1-enyl-4-hydroxynaphthalene-1,2-dione
    1,3-indandione
    2-hydroxy-3-iodo-1,4-naphthoquinone
    3-(2-ethylbut-1-enyl)-4-hydroxynaphthalene-1,2-dione

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