| 1 | 52-00-6 | Spiro[chrysene-1(2H),2'-[1,3]dioxolane], 3,5,6,11,12,12a-hexahydro-8-methoxy-12a-methyl-, (S)- (9CI) | C22H26O3 | 338.44 | | |
| 2 | 52-01-7 | Spironolactone | C24H32O4S | 416.58 | 207-208 °C (lit.) | practically insoluble |
| 3 | 52-02-8 | Spiro[estr-4-ene-17,2'(3'H)-furan]-3-one, 4',5'-dihydro- (7CI,8CI,9CI) | C21H30O2 | 314.46 | | |
| 4 | 52-12-0 | tetrafluorophthalicanhydride | C23H29ClO6 | 436.93 | | |
| 5 | 52-21-1 | prednisolone acetate | C23H30O6 | 402.49 | 240-244°C | 11.6mg/L(25 ºC) |
| 6 | 52-24-4 | Thiotepa | C6H12N3PS | 189.22 | 54-57 °C | 19 g/100 mL (25 ºC) |
| 7 | 52-26-6 | MORPHINIUM CHLORIDE | C17H20ClNO3 | 321.8 | about 200° (dec) | |
| 8 | 52-28-8 | codeine phosphate | C18H22NO6P | 379.344141 | 238-240°C | |
| 9 | 52-30-2 | 1-ethyl-4,4-dimethyl-8,10-diaza-4-silaspiro[5.5]undecane-7,9,11-trione | C12H20N2O3Si | 268.38 | | |
| 10 | 52-31-3 | Cyclobarbital | C12H16N2O3 | 236.27 | 171-174° | 8.27g/L(25 ºC) |
| 11 | 52-39-1 | Aldosterone | C21H28O5 | 360.45 | 170-172°C | 51.18mg/L(37 ºC) |
| 12 | 52-41-5 | 8,8-Dimethyl-2,4-diaza-8-silaspiro[5.5]undecane-1,3,5-trione | C10H16N2O3Si | 240.33 | | |
| 13 | 52-42-6 | 8,8-Dimethyl-3-thioxo-2,4-diaza-8-silaspiro[5.5]undecane-1,5-dione | C10H16N2O2SSi | 256.4 | | |
| 14 | 52-43-7 | ALLOBARBITAL | C10H12N2O3 | 208.21 | 171-173° | 1.77g/L(25 ºC) |
| 15 | 52-44-8 | Spiro[pyrimidine-5,1'-cyclohexane]-2,4,6(1H,3H,5H)-trione | C9H12N2O3 | 196.2 | | 170.7mg/L(25 ºC) |
| 16 | 52-45-9 | 3-Thioxo-2,4-diazaspiro[5.5]undecane-1,5-dione | C9H12N2O2S | 212.27 | | 73.23mg/L(25 ºC) |
| 17 | 52-46-0 | 2,2,4,4,6,6-hexaaziridin-1-yl-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-tri phosphacyclohexa-1,3,5-triene | C12H24N9P3 | 387.3 | 147.5° | 100g/L(temperature not stated) |
| 18 | 52-49-3 | benzhexol hydrochloride | C20H31NO.ClH | 337.93 | Free base, mp 114.3-115.0° | 670.9ug/L(22.5 ºC) |
| 19 | 52-51-7 | 2-Bromo-2-nitro-1,3-propanediol | C3H6BrNO4 | 199.99 | 130-133°C(lit.) | 25 g/100 mL (22 ºC) |
| 20 | 52-52-8 | Cycloleucine | C6H11NO2 | 129.16 | 320 °C (dec.) (lit.) | 5 g/100 mL |
| 21 | 52-53-9 | verapamil | C27H38N2O4 | 454.61 | 25°C | |
| 22 | 52-55-1 | 8,8,11-Trimethyl-2,4-diaza-8-silaspiro[5.5]undecane-1,3,5-trione | C11H18N2O3Si | 254.36 | | |
| 23 | 52-56-2 | 8,8-Dimethyl-2,4-diaza-8-silaspiro[5.6]dodecane-1,3,5-trione | C11H18N2O3Si | 254.36 | | |
| 24 | 52-57-3 | 8,8-Dimethyl-3-thioxo-2,4-diaza-8-silaspiro[5.6]dodecane-1,5-dione | C11H18N2O2SSi | 270.42 | | |
| 25 | 52-60-8 | (3,5-dimethyl-4-methylsulfanyl-phenoxy)-diethoxy-sulfanylidene-phospho rane | C13H21O3PS2 | 320.41 | | |
| 26 | 52-61-9 | N-benzyl-3-pyrrolidylacetate methobromide | | | | |
| 27 | 52-62-0 | PENTOLINIUM TARTRATE | C23H42N2O12 | 538.59 | 215 °C | |
| 28 | 52-64-2 | GLYCINE, [2-14C] | C2H5NO2 | 77.08 | | |
| 29 | 52-66-4 | DL-Penicillamine | C5H11NO2S | 149.21 | 204-208°C(lit.) | Soluble in ethanol, hot water and sodium hydroxide. |
| 30 | 52-67-5 | D(-)-Penicillamine | C5H11NO2S | 149.21 | 212℃ | 11.1 g/100 mL (20℃) |
| 31 | 52-68-6 | Trichlorphon | C4H8Cl3O4P | 257.44 | 77-81 °C | Slightly soluble. 1-5 g/100 mL at 21 ºC |
| 32 | 52-69-7 | 1H-Inden-1-ol, 2-[(dimethylamino)methyl]-1-ethyl-2,3-dihydro-2-methyl-3-phenyl-, hydrochloride (1:1) | C21H27NO.ClH | | | |
| 33 | 52-70-0 | 6α,?9α-?Difluoroprednisolone 21-Acetate | C23H28F2O6 | 438.46 | | |
| 34 | 52-72-2 | Androstan-17-one, 3-hydroxy-2-(4-morpholinyl)-, (2β,3α,5α)- | C23H37NO3 | 375.54 | | |
| 35 | 52-73-3 | A-Norandrostane-2,17-diol, 2-ethynyl-17-methyl-, (2β,5α,17β)- (9CI) | C21H32O2 | 316.48 | | |
| 36 | 52-74-4 | f)naphthalene-2-beta,7-beta-diol, hexadecahydro-2-alpha,7-alpha-dicyclopenta( 10a-dimethyl-diethynyl- 8 | C22H30O2 | 326.48 | | |
| 37 | 52-76-6 | lynestrenol | C20H28O | 284.44 | 158°C | |
| 38 | 52-78-8 | Norethandrolone | C20H30O2 | 302.45 | 130-136°C | |
| 39 | 52-79-9 | 4,5α-Dihydronorethisterone | C20H28O2 | 300.44 | | |
| 40 | 52-85-7 | FAMPHUR | C10H16NO5PS2 | 325.34 | 53℃ | 5000 (est. 20 °C) |
| 41 | 52-86-8 | Haloperidol | C21H23ClFNO2 | 375.86 | 152 °C | 2.058mg/L(22.5 ºC) |
| 42 | 52-88-0 | ATROPINE METHYL NITRATE | C18H26N2O6 | 366.41 | 163°C | |
| 43 | 52-89-1 | L-Cysteine hydrochloride anhydrous | C3H8ClNO2S | 157.62 | 180°C | SOLUBLE |
| 44 | 52-89-1 | Cysteine Hydrochloride | C3H8ClNO2S | 157.62 | 180°C | SOLUBLE |
| 45 | 52-90-4 | L(+)-Cysteine | C3H7NO2S | | 220℃ | 280 g/L (25℃) |