1315. Blankophor(R) R (Bayer)
Nomenclature
CAS number: 2606-93-1
2,2′-(1,2-Ethenediyl)bis[5-[[(phenylamino)carbonyl]amino]benzenesulfonic
acid] disodium salt; 4,4′-bis(3-phenylureido)-2,2′-stilbenedisulfonic acid disodium
salt; [stilbene-(4,4′)]bis[ω-phenylurea]-2,2′-disulfonic acid disodium
salt; C.I. Fluorescent Brightener 30; C.I. 40600; Blancol C; Leucophor R; Lumisol RV; Phorwite RN; Photine R; Pontamine White BR; Tintophen X. C28H22N4Na2O8S2; mol wt 652.61.
C 51.53%, H 3.40%, N 8.59%, Na 7.05%, O 19.61%, S 9.83%.
Description and 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.
