• Rexpearl RA
• 26061-90-5
• (C₇H₁₀O₃·C₂H₄)x
• 0
• .

• Rhodium(1+), [(1,2,5,6-h)-1,5-cyclooctadiene][N-(2-pyridinylmethylene)ethanamine-N,N']-,chloride (9CI)
• 98716-30-4
• C16H22 N2 Rh . Cl
• 0
• .

• Rosin, polymd., polymer with maleic anhydride, phthalic anhydride, tall oil, tetrahydroabietyl alc. and trimethylolpropane
• 121617-10-5
• 0
• .

• Riboflavin,2',3',4',5'-tetra-3-pyridinecarboxylate (9CI)
• 24629-40-1
• C41H32 N8 O10
• 796.7404
• .

• Rhodium,carbonylchlorobis(triphenylphosphine)-, (SP-4-3)-
• 15318-33-9
• C37H30 Cl O P2 Rh
• 0
• .

• Rhodium, isotope ofmass 101
• 14378-53-1
• Rh
• 100.9062
• .

• RNA formation factor(Drosophila clone cosh gene hairy reduced) (9CI)
• 127385-83-5
• 0
• .

• Rosin, polymer with p-tert-butylphenol, formaldehyde, glycerol and pentaerythritol
• 70025-25-1
• (C10H14O·C5H12O4·C3H8O3·CH2O·W99)x
• 0
• .

• Rifampin & Isoniazid & Pyrazinamide
• 161935-14-4
• C₅₄H₇₀N₁₀O₁₄
• 0
• .

• Renew
• 89073-20-1
• C₂₈H₂₀N₂O
• 0
• .

• Ruthenium chloride(RuCl4) (6CI,7CI,8CI,9CI)
• 13465-52-6
• Cl4Ru
• 236-697-5
• 242.882
• .

• Ribitol,1,4-anhydro-2,3-O-(1-methylethylidene)-, 4-methylbenzenesulfonate (9CI)
• 30002-85-8
• C15H20 O6 S
• 328.3807
• .

• Rennin
• 9001-98-3
• 232-645-0
• 0
• .

• Russellysin
• 79393-92-3
• 0
• .

• Radium chloride (RaCl2)(9CI)
• 10025-66-8
• Cl2Ra
• 233-035-7
• 0
• .

• Ruthenium sulfide(RuS2)
• 12166-20-0
• RuS2
• 235-318-0
• 165.2
• .

• RNA formation factor(plasmid pTiC58 clone pNOC105 gene nocR reduced) (9CI)
• 145112-98-7
• 0
• .

• Retinol, acetate,labeled with tritium (9CI)
• 64536-04-5
• C22H32 O2
• 328.4883
• .

• Rhenate (ReO41-),(T-4)- (9CI)
• 14333-24-5
• O4Re
• 0
• .

• Relaxin (guinea pig)(9CI)
• 161755-82-4
• C267H453 N77 O80 S8
• .

• Ryoto Sugar Ester S 1570
• 37318-31-3
• C₃₀H₅₈O₁₃
• 253-459-6
• 626.7737
• .

• Rhizoxin,13-hexadecanoate
• 135819-69-1
• C51H77 N O10
• 0
• .

• Ribonucleoprotein(human clone 5 small nuclear RNA-containing B-subunit reduced) (9CI)
• 128027-71-4
• 0
• .

• Resin acids and Rosinacids, tall-oil, fumarated, ketene deriv.
• 101013-01-8
• 309-802-8
• .

• Rhodium,chlorotris(triphenylarsine)-, (SP-4-2)-
• 14973-92-3
• C54H45 As3 Cl Rh
• 239-051-0
• 1057.0584
• .

• Ruthenium(3+),pentaammine(3,9-dihydro-1,3-dimethyl-1H-purine-2,6-dione-N7)-, trichloride,(OC-6-22)- (9CI)
• 55208-38-3
• C7H23 N9 O2 Ru . 3 Cl
• 0
• .

• Riboflavin, 6-azido-(9CI)
• 101760-83-2
• C17H19 N7 O6
• 0
• .

• RNA formation factor(human clone l14Bgene HOX4C reduced) (9CI)
• 145420-68-4
• 0
• .

• R-ALBUTEROL HYDROCHLORIDE
• 148563-16-0
• C₁₃H₂₁NO₃
• 239.3107
• .

• Rhodium,dicarbonyl(diphenylcarbamodithioato-S,S)-, (SP-4-2)- (9CI)
• 139522-78-4
• C15H10 N O2 Rh S2
• 0
• .

• Rhodium(3+),(2,2'-bipyridine-kN1,kN1')bis[9,10-phenanthrenediaminato(2-)-kN,kN']-, chloride (1:3), (OC-6-22)-
• 121174-98-9
• C38H28 N6 Rh . 3 Cl
• 0
• .

• Ruthenocene, acetyl-
• 1316-92-3
• C12H12 O Ru
• 0
• .

• Rifamycin,4-O-[2-(2,5-dimethyl-1-pyrrolidinyl)-2-oxoethyl]- (9CI)
• 38123-17-0
• C45H60 N2 O13
• 0
• .

• Rhamnus frangula, ext.
• 84625-48-9
• 283-418-8
• 0
• .

• Ranatensin M (9CI)
• 135727-57-0
• C48H64 N14 O8 S
• 0
• .

• Ramoplanin A 1 (peptidemoiety), 1-[N2-[(2Z,4E)-8-methyl-1-oxo-2,4-nonadienyl]-L-asparagine]-11-[(2S)-2-[4-(a-D-mannopyranosyloxy)phenyl]glycine]-(9CI)
• 124884-30-6
• C114H146 Cl N21 O35
• 2405.9517
• .

• Radium, ion (Ra2+)
• 22541-36-2
• Ra
• 190.23
• .

• Riboflavin 5-(sodium hydrogen phosphate)
• 214464-97-8
• C₁₇H₂₀N₄NaO₉P
• 478.3256
• .

• RNA formation factor(Rhodobacter capsulatus clone pBC2 gene hupR1) (9CI)
• 144131-07-7
• 0
• .

• Red 3
• 1342-25-2
• C9H8BrN5
• 0
• .

• RNA formation factor(mouse gene Hoxa-10 homeodomain-containing isoform 10-1) (9CI)
• 164384-16-1
• 0
• .

• Reductase, L-xylulose
• 9028-17-5
• 0
• .

• Radon, isotope of mass228
• 121239-98-3
• Rn
• 228
• .

• Rifamycin,1,4-dideoxy-1,4-dihydro-1,4-dioxo-, 8-acetate (9CI)
• 31692-65-6
• C39H47 N O13
• 737.7894
• .

• Ryanotoxin
• 179987-30-5
• C₁₀H₈N₂O₄S
• 0
• .

• Rifamycin P,2'-(hydroxymethyl)- (9CI)
• 59232-88-1
• C39H48 N2 O12 S
• 0
• .

• Rhenium, isotope ofmass 185
• 14391-28-7
• Re
• 0
• .

• Riboflavin, cyclic2',5'-(hydrogen phosphate) (9CI)
• 2461-66-7
• C17H19 N4 O8 P
• .

• Ruthenium,[(1,2,3,3a,7a-h)-1H-inden-1-yl][(1,2,3,4,5-h)-1,2,3,4,5-pentamethyl-2,4-cyclopentadien-1-yl]-
• 115560-11-7
• C19H22 Ru
• 0
• .

• Rhizoxin,2,3-deepoxy-2,3-didehydro-
• 103528-75-2
• C35H47 N O8
• .