• Ruthenium, bis(acetato-kO,kO')[1,1'-(1S)-[1,1'-binaphthalene]-2,2'-diylbis[1,1-bis(4-methylphenyl)phosphine-kP]]-, (OC-6-22)-
• 106681-15-6
• C52H46 O4 P2 Ru
• 0
• .

• Ruthenium, chloro(h5-2,4-cyclopentadien-1-yl)bis(triphenylphosphine)-
• 32993-05-8
• C₄₁H₃₅ClP₂Ru
• 726.19
• .

• Rubidium nitride (Rb3N)(7CI,8CI,9CI)
• 12136-85-5
• NRb3
• 99.47
• .

• Rosin, polymer with benzoic acid, glycerol, isophthalic acid, soybean oil and tung oil
• 106233-04-9
• 0
• .

• Ruthenium,dichloro[(1,2,3,4,5-h)-1,2,3,4,5-pentamethyl-2,4-cyclopentadien-1-yl]-, homopolymer
• 96503-27-4
• C10 H15 Cl2 Ru
• 614.4
• .

• Ruthenium,dichlorotetrakis(triphenylphosphine)-
• 15555-77-8
• C72H60 Cl2 P4 Ru
• 239-569-7
• 958.83
• .

• Ruthenium, bis(h6-benzene)di-m-chlorodichlorodi-
• 37366-09-9
• C12H12 Cl4 Ru2
• 500.18
• .

• Ruthenium(1+),[1,1'-(1S)-[1,1'-binaphthalene]-2,2'-diylbis[1,1-diphenylphosphine-kP]]chloro[(1,2,3,4,5,6-h)-1-methyl-4-(1-methylethyl)benzene]-,chloride (1:1)
• 130004-33-0
• C₅₄H₄₆Cl₂P₂Ru
• 928.87
• .

• Ropivacaine hydrochloride
• 132112-35-7
• C₁₇H₂₉ClN₂O₂
• 328.88
• .

• Ribonuclease (Rana pipiens)
• 196488-72-9
• .

• Radon, isotope of mass219
• 14835-02-0
• Rn
• 0
• .

• Rosmarinic acid
• 20283-92-5
• C₁₈H₁₆O₈
• 360.31
• .

• Risperidal
• 106266-06-2
• C₂₃H₂₇FN₄O₂
• 410.49 .
• .

• Retinoic acid,12-(hydroxymethyl)-, d-lactone, 11-cis- (9CI)
• 83860-24-6
• C21H28 O2
• 0
• .

• Rubidium, isotope ofmass 82
• 14391-63-0
• Rb
• 81.918208
• .

• Riboflavin5'-(dihydrogen phosphate)
• 146-17-8
• C17H21 N4 O9 P
• 205-664-7 (Base)204-988-6
• 478.33 .
• .

• Rifamycin,4-O-[2-(methylpropylamino)-2-oxoethyl]- (9CI)
• 16784-10-4
• C43H58 N2 O13
• 0
• .

• Rhenium fluoride (ReF7)(6CI,7CI,8CI,9CI)
• 17029-21-9
• F7Re
• 319.2
• .

• Ruthenium,chlorohydrotris(triphenylphosphine)-, (TB-5-13)-
• 55102-19-7
• C₅₄H₄₆ClP₃Ru
• 259-480-7
• 923.38
• .

• Ro 8-6837
• 19728-88-2
• C₂₄H₂₈N₂O₄S₂
• 472.62
• .

• Resinacids and Rosin acids, fumarated, sodium salts
• 68201-59-2
• C₁₄H₃₁O₂PS₂
• 269-227-2
• 326.498501
• .

• Riboflavin,8-demethyl-8-(methylamino)- (9CI)
• 62746-55-8
• C17H21 N5 O6
• 0
• .

• Restriction endodeoxyribonuclease ScrFI
• 85537-83-3
• C₂₄H₂₂N₅NaO₇S
• 0
• .

• Roridin
• 11113-83-0
• 0
• .

• RNA formation factorHEB (human reduced) (9CI)
• 142661-93-6
• 0
• .

• RNA formation factor(Petunia hybrida strain Titan parade gene EPF2-5a) (9CI)
• 161413-86-1
• C₁₈H₁₁NO₃
• 0
• .

• RNA formation factorTMF (human clone G8 TATA box-binding reduced) (9CI)
• 149954-67-6
• 0
• .

• Richamate 3780
• 73806-67-4
• C₂₈H₅₆N₂O₅
• 0
• .

• Riboflavin5'-(dihydrogen phosphate), monosodium salt, dihydrate (9CI)
• 6184-17-4
• C₁₇H₂₄N₄NaO₁₁P
• 204-988-6
• 514.36
• .

• Rifamycin,3-[[(3-phenylpropoxy)imino]methyl]- (9CI)
• 38128-87-9
• C47H58 N2 O13
• 0
• .

• Raclopride tartrate
• 98185-20-7
• C₁₉H₂₆Cl₂N₂O₉
• 0
• .

• Roseocitrin B (9CI)
• 102583-56-2
• .

• Rubomycin,13-(cyclohexylidenehydrazone) (9CI)
• 107283-03-4
• C₃₃H₃₉N₃O₉
• 0
• .

• Retinoic acid, 9-cis-
• 5300-03-8
• C₂₀H₂₈O₂
• 300.44
• .

• Rhenium carbonyl(Re(CO)5) (9CI)
• 15684-00-1
• C5O5 Re
• 239-767-3
• 336.3369
• .

• Rhizoxin,2,3:11,12-dideepoxy-2,3,11,12-tetradehydro-17-O-demethyl-
• 103528-78-5
• C34H45 N O7
• .

• Russtoxin (9CI)
• 161279-75-0
• C₁₂H₂₁ClN₄O₃S
• 336.83814
• .

• Rhodium chloride(RhCl3), trihydrate (8CI,9CI)
• 13569-65-8
• RhCl₃^.3H₂O
• 263.32
• .

• Reductase, riboflavinmononucleotide (reduced nicotinamide adenine dinucleotide (phosphate))
• 64295-83-6
• 264-772-2
• .

• Rifamycin sodium salt
• 14897-39-3
• C₃₇H₄₆NNaO₁₂
• 238-965-7
• 719.75
• .

• Repressor (Rhizobiummeliloti clone pEK7059 gene nolR) (9CI)
• 144715-57-1
• 0
• .

• Restrictocin
• 1406-72-0
• C₁₀H₁₇N₃O₂
• 0
• .

• Radium chloride(224RaCl2) (8CI,9CI)
• 27388-89-2
• Cl2Ra
• .

• Rhizoxin,2,3:5b,7-dideepoxy-2,3-didehydro-5b-ethoxy-7-hydroxy- (9CI)
• 103745-26-2
• C37H53 N O9
• .

• Reaction product of benzoic acid, 2,3,4,5-tetrachloro-6-cyano-, methyl ester with sodium methylate and benzeneamine, 4-((4-amino-phenyl)azo)-3-methyl-
• 106276-78-2
• C₂₃H₂₀Cl₄N₅NaO₃
• 0
• .

• Rohdeilitorin (9CI)
• 96563-00-7
• C₅₁H₆₉N₁₃O₁₁S
• 0
• .

• Radium, isotope of mass228
• 15262-20-1
• Ra
• 228.0311
• .

• RNA formation factor(Saccharomyces cerevisiae clone pTSC291 gene DAL80 reduced) (9CI)
• 145169-89-7
• 0
• .

• RNA formation factor(Saccharomyces cerevisiae gene RNA1 protein moiety reduced) (9CI)
• 126098-84-8
• 0
• .

• Rubidium tungstate
• 13597-52-9
• O₄Rb₂W-₆
• 237-049-4
• 418.77
• .