Jingmen City Qiangsheng Industrial Co., Ltd.
    Jingmen City Qiangsheng Industrial Co., Ltd.
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    Jingmen City Qiangsheng Chemical Co., Ltd.
    Add: Macheng Industrial Park, Duodao District, Jingmen City, Hubei, China
    P. C.: 448000
    Tel: +86-724-2403388
    Fax: +86-724-2403386
    Contact: Mr. Xiao
    Mobile: +86-13971836398

    Pigment yellow 191

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    Natural color:

    Dilute color:

    pigment yellow  191, product name is Pigment Yellow 191, alias is C.I. pigment yellow 191, CAS RN is 129423-54-7, molecular formula is C17H13CaClN4O7S2, it has similar color light to C.I. pigment yellow 83, but better heat resistance.

    Structural formula:


    Basic information

    Product name:Pigment Yellow 191

    Alias: -; C.I. Pigment Yellow 191; Pigment Brilliant Yellow HGR; c.i. 18795; 4-Chloro-2-[[4,5-dihydro-3-methyl-5-oxo-1-(3-sulfophenyl)-1H-pyrazol-4-yl]azo]-5-methylbenzenesulfonic acid calcium salt (1:1); PYRAZOLONE YELLOW HGR; Benzenesulfonic acid, 4-chloro-2-4,5-dihydro-3-methyl-5-oxo-1-(3-sulfophenyl)-1H-pyrazol-4-ylazo-5-methyl-, calcium salt (1:1); Pigment -- Pigment Yellow 191; 4-Chloro-2-[5-hydroxy-3-methyl-1-(3-sulfophe- nyl)pyrazol-4-ylazo]-5-methylbenzene sulfonic acid, calcium salt

    CAS RN:129423-54-7

    Molecular formula:C17H13CaClN4O7S2

    Molecular weight:524.97

    Physical property data

    Hue or color tone: red light yellow

    Relative density: 1.6

    Bulk density/(lb/gal): 11.7-11.8

    Melting point/℃: >400

    Average particle size/μm: 0.16

    Particle shape: cubic

    Specific surface area/(m2/g): 26

    pH value/(10% sizing agent): 7

    Oil absorption: 40±5 grade

    Covering power: semi-transparent

    Red light yellow powder, with favorable acid resistance, alkali resistance and heat resistance

    Main uses

    Its color tone is similar to that of C.I. pigment yellow 83. It has lower color power, but better heat resistance. In high-density polyethylene (HDPE, 1/3 standard depth), heat resistance is 300℃, favorable light fastness (7-8 grade); it has excellent migration resistance in plastic; in polycarbonate, its heat resistance can reach 330℃.

    System No.

    CAS RN: 129423-54-7

    EINECS No.: 403-530-4

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