optical brightener for cotton,MST 353 High whitness and light fastness used in cotton fabrics.
Mainly used for high quality f

optical brightener for cotton,MST 353

C.I.353 CAS55585-28-9

STRUCTURE:

MOLECULAR FORMULA: C40H36N12 O20Na6
MOLECULAR WEIGHT1334.10 (As International relative Atom Mass 1997)
Max UV ABSORPTION WAVELENGHTH: 349±1 nm
CHARACTER: Showing nionic character and blue color fluorescence
EXCUTIVE STANDARD HG/T 3970-2007
SPECIFICATIONS:

Item

Index

Appearance

Light yellow uniform powder

Liquid

Fluorescent strenghth (equivalent to the standard sample, E = 400±10)

100±3

Color Shade

Similar

Whiteness (the deviation with the standard sample)

≥ -3

Water content

≤ 5.0%

Content of water-insoluble impurities

≤ 0.5%

Fineness (residual content passed through 250μm-pore sieve)

≤ 10%

PROPERTY:
    1.Good water solubility and can be dissolved in 3-5 times boiling water, and its solubility is 300g per liter in boiling water and 150g per liter in cooling water.
    2. Good resistance to hard water, the ions of Ca2+ and Mg2+ have no influence on its whitening effect.
    3. Good resistance to peroxide bleaching agent and containing reductive bleaching agent (sodium hydrosulfite).
    4. General acid-resistance and the optimal applied pH value >7.
USEAGE:
    1. Used for cotton fiber and glue fiber.
    2. Used in the syrup of discharge pattern of printing color.
    3. Used in paper pulp.
    4. Used in the process of surface gluing.
    5. Used in the process of coating.
PROCESS:(SUCH AS PADDING DYEING)
    Bath temperature is about 95-98, holding time is about 10-20 minutes, bath ratio is 1:20, vapour steaming about 45 minutes. The dosage is 0.1-0.5%.
PACKAGE: Packed in cardboard bucket after being packed in plastic bag first. Net weight per bucket is 20 kg or 25 kg.
TRANSPORTATION: Should avoid sunlight and crash.
STORAGE: Should be stored in cool, dry and ventilate place, and storage period should not exceed 2 years.