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Resorcinol
(Resorcin)
·¹¼Ò½Ã³î C6H6O2 EP 25g,500g
Riboflavin
(Vitamin B2)
¸®º¸Çöóºó C17H20N4O6 GR 25g
Rochelle Salt 99.5%
(Pot. Sodium Tartrate tetrahydrate)
·Ô¼¿¿° C4H4KNaO6.4H2O EP 500g
Rongalite
(Sod. formaldehyde sulfoxylate dihydrate)
·Õ°¡¸®Æ® CH3NaO3S.2H2O   500g
Rosolic Acid Solution ·ÎÁ¹»ê¿ë¾×     500mL