Blankophor?R
Title: Blankophor® R (Bayer)
CAS Registry Number: 2606-93-1
CAS Name: 2,2¢-(1,2-Ethenediyl)bis[5-[[(phenylamino)carbonyl]amino]benzenesulfonic acid] disodium salt
Additional Names: 4,4¢-bis(3-phenylureido)-2,2¢-stilbenedisulfonic acid disodium salt; [stilbene-(4,4¢)]bis[w-phenylurea]-2,2¢-disulfonic acid disodium salt; C.I. Fluorescent Brightener 30; C.I. 40600
Trademarks: Blancol C; Leucophor R; Lumisol RV; Phorwite RN; Photine R; Pontamine White BR; Tintophen X
Molecular Formula: C28H22N4Na2O8S2
Molecular Weight: 652.61
Percent Composition: C 51.53%, H 3.40%, N 8.59%, Na 7.05%, O 19.61%, S 9.83%
Literature References: Prepd by treating 4,4¢-diamino-2,2¢-stilbenedisulfonic acid with phenyl isocyanate in aq soln at 40°: DE 746569 and FR 878155 (to I. G. Farbenind.); GB 683895 (1952 to Bayer); FIAT Final Rept. No. 1302 (Sept. 15, 1947); Colour Index Vol. 4 (3rd ed., 1971) p 4371.
Use: Fluorescent dye for cellulose, protein fibers, nylon, wool or paper.

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