Fluorescent Brightener 113

Fluorescent Brightener 113 is readily soluble in water, acid-resistant, alkali-resistant, and has much better whitening effect than VBL at pH 4.5-7. Belonging to anionic type, it can be used in the one bath with anionic or nonionic surfactants.
Fluorescent Brightener 113
C.I.113 or 85 or 28       CAS：12768-92-2     
STRUCTURE:

MOLECULAR FORMULA: C40H42N12O10S2Na2
MOLECULAR WEIGHT: 960.95 (As International relative Atom Mass 1991)
MAX UV ABSORPTION SPECTRUM: 348 nm
EXCUTIVE STANDARD: HG/T3990-2007
SPECIFICATIONS:
ITEM INDEX
Appearance Light yellow uniform powder
Fluorescent Strenghth (equivalent to the standard sample) 350±10
Color Shade Similar to Slightly Different
Moisture content                                                  ≤ 5%
Content of water-insoluble impurities ≤0.5%
Fineness (residual content passed through 180μm-pore sieve )      ≤10%
APPLICATION:
 Mainly applied to whiten paper pulp, surface sizing, coating, and also applied to whiten cotton, linen and cellulose fiber as well as cellulose fabrics, and to brighten light-colored cellulose fabrics.