| 1 | 999-01-9 | O,O-diethyl thiophosphonate | C4H11O2PS | 154.17 | | |
| 2 | 999-05-3 | 7-METHYL-2,4-OCTANEDIONE | C9H16O2 | | | |
| 3 | 999-06-4 | 4-BROMOOCTANE | C8H17Br | 193.12 | | |
| 4 | 999-07-5 | 4-CHLOROOCTANE | C8H17Cl | 148.67 | -41.9°C (estimate) | |
| 5 | 999-09-7 | ETHYL PENTANIMIDATE | C7H15NO | 129.2 | | |
| 6 | 999-10-0 | Ethyl 4-hydroxybutanoate | C6H12O3 | 132.16 | | |
| 7 | 999-21-3 | Diallyl maleate | C10H12O4 | 196.2 | −47°C(lit.) | Soluble in water 151.2 mg/L @ 25°C. |
| 8 | 999-22-4 | N,N''-ethylenebis[N-methylpropane-1,3-diamine] | C10H26N4 | 202.34024 | | |
| 9 | 999-29-1 | ethyl diazoacetylglycinate | C6H9N3O3 | | | |
| 10 | 999-30-4 | ethyl 2-(ethoxycarbonylamino)acetate | C7H13NO4 | 175.18 | | |
| 11 | 999-33-7 | N-butyl-N-chloro-1-butanamine | C8H18ClN | 163.69 | | |
| 12 | 999-34-8 | Methyldithiophosphonous acid dipropyl ester | C7H17PS2 | | | |
| 13 | 999-40-6 | Neryl butyrate | C14H24O2 | 224.34 | | |
| 14 | 999-47-3 | Acetic acid, 2-[2-(aminocarbonyl)hydrazinylidene]-, ethyl ester | C5H9N3O3 | 159.14 | | |
| 15 | 999-49-5 | Decane, 4-chloro- | C10H21Cl | 176.73 | | |
| 16 | 999-50-8 | ethyl 3-(2-chloroethylsulfanyl)propanoate | C7H13ClO2S | | | |
| 17 | 999-52-0 | 3-CHLOROHEPTANE | C7H15Cl | 134.65 | -69.5°C (estimate) | |
| 18 | 999-55-3 | Allyl acrylate | C6H8O2 | 112.13 | | Slightly soluble in water. |
| 19 | 999-59-7 | Methyl N,N-dimethylaminoacrylate | C6H11NO2 | 129.16 | 48-49 °C | |
| 20 | 999-61-1 | 2-HYDROXYPROPYL ACRYLATE | C6H10O3 | 130.14 | | |
| 21 | 999-64-4 | 3-Bromooctane | C8H17Br | 193.12 | | |
| 22 | 999-65-5 | 1-(1-Methylpropoxy)butane | C8H18O | 130.23 | | |
| 23 | 999-68-8 | Acetic acid, 2-[2-(aminocarbonyl)hydrazinylidene]-, methyl ester | C4H7N3O3 | 145.12 | | |
| 24 | 999-72-4 | 3,3'-Dithio-bis(N-methylpropionamide) | C8H16N2O2S2 | 236.35 | 111-112 °C | |
| 25 | 999-78-0 | 4,4-Dimethyl-2-pentyne | C7H12 | 96.17 | -82.4°C | Immiscible with water. |
| 26 | 999-81-5 | Chlormequat chloride | C5H13Cl2N | 158.07 | 239-243°C (dec.)(lit.) | almost transparency |
| 27 | 999-82-6 | 2-Bromoethylphosphonic Acid | C2H6BrO3P | 188.95 | 93-95℃ | |
| 28 | 999-89-3 | Silane, dichloromethyl(1-methylethoxy)- | C4H10Cl2OSi | 173.1131 | | |
| 29 | 999-90-6 | S-TERT-BUTYL THIOACETATE | C6H12OS | 132.22 | | |
| 30 | 999-97-3 | 1,1,1,3,3,3-Hexamethyldisilazane | C6H19NSi2 | 161.39 | -78℃ | REACTS |
| 31 | 999-97-3 | | C6H19NSi2 | 161.39 | -78 ºC | |
| 32 | 999-99-5 | N-(Trimethyl-silyl)-ethane-sulfonamide | C5H15NO2SSi | 181.33 | | |