Dimethyl Ketoxime
Acetoxime
CAS: 127-06-0
Molecular Formula: C3H7NO
Dimethyl Ketoxime - Names and Identifiers
| Name | Acetoxime |
| Synonyms | ACETOXIME Acetoxime Acetone Oxime ACETONE OXIME Dimethyl Ketoxime propan-2-oneoxime 2-Propanone oxime 2-PROPANONE OXIME DI METHYL KETOXIME LABOTEST-BB LT00516122 N-hydroxypropan-2-imine N-Isopropylidenehydroxylamine N-Propan-2-ylidenehydroxylamine |
| CAS | 127-06-0 |
| EINECS | 204-820-1 |
| InChI | InChI=1/C3H7NO/c1-3(2)4-5/h5H,1-2H3 |
| InChIKey | PXAJQJMDEXJWFB-UHFFFAOYSA-N |
Dimethyl Ketoxime - Physico-chemical Properties
| Molecular Formula | C3H7NO |
| Molar Mass | 73.09 |
| Density | 0.901g/mLat 25°C(lit.) |
| Melting Point | 60-63°C(lit.) |
| Boling Point | 135°C(lit.) |
| Flash Point | 60 °C |
| Water Solubility | 330 g/L (20 ºC) |
| Vapor Presure | 1.64-2.42hPa at 25℃ |
| Appearance | White solid |
| Specific Gravity | 0.901 |
| Color | White to yellow |
| Merck | 14,75 |
| BRN | 1560146 |
| pKa | 12.2(at 25℃) |
| Storage Condition | Sealed in dry,Room Temperature |
| Refractive Index | 1.4156 |
| MDL | MFCD00002118 |
| Physical and Chemical Properties | appearance white crystals |
| Use | It is the raw material of medicine, pesticide, dye and organic silicon coupling agent, and can also be used for the identification of nickel and cobalt in Analytical reagents. Chemical oxygen scavenger for water supply, protective agent for thermal equipment |
Dimethyl Ketoxime - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Safety Description | S22 - Do not breathe dust. S24/25 - Avoid contact with skin and eyes. |
| UN IDs | UN1325 |
| WGK Germany | 3 |
| RTECS | AL6825000 |
| FLUKA BRAND F CODES | 21 |
| TSCA | Yes |
| HS Code | 29280000 |
| Hazard Class | 4.1 |
| Packing Group | III |
| Toxicity | LD orl-rat: >500 mg/kg NCNSA6 5,26,53 |
Dimethyl Ketoxime - Upstream Downstream Industry
| Raw Materials | Acetone Sodium hydroxide Hydroxylamine hydrochloride |
| Downstream Products | Hydroxylamine sulfate |
Dimethyl Ketoxime - Nature
Open Data Verified Data
White prisms, oblique crystals or powder, with aromatic flavor. Soluble in water, ethanol, ether, petroleum ether and other organic solvents. Easy hydrolysis in dilute acid. Irritant, volatile in the air quickly, is a strong reducing agent, at room temperature can make KMr104 fade. In case of fire combustible, high thermal decomposition of nitrogen oxide gas.
Last Update：2024-01-02 23:10:35
Dimethyl Ketoxime - Preparation Method
Open Data Verified Data
Under the action of sodium hydroxide, from acetone and hydroxylamine.
Last Update：2022-01-01 09:30:23
Dimethyl Ketoxime - Introduction
It smells like chloral hydrate. Sensitive to humidity. Volatile quickly in. Neutral reaction. Easily soluble in water, ethanol, ether, petroleum ether. It is easy to hydrolyze in dilute acid. Half lethal dose (mice, abdominal cavity) 4000mg/kg. Water solubility: 320g/l(21 ℃), soluble in organic solvents such as alcohol, ether, ketone, hydrocarbon, etc.
Last Update：2022-10-16 17:13:02
Dimethyl Ketoxime - Use
Open Data Verified Data
Acetone oxime has strong reducibility, it is easy to react with the oxygen in the feed water, reduce the dissolved oxygen content in the feed water, and prevent the formation of iron scale and copper scale. Can be used for medium and high pressure boiler as boiler feed water oxygen scavenger. In use, the excess amount of Acetone oxime in the feed water is controlled to be 15 to 40ug/L.
Last Update：2022-01-01 09:30:23
Dimethyl Ketoxime - Safety
Open Data Verified Data
stored in ventilated, low temperature, dry warehouse, and oxidant, acid storage separately.
Last Update：2022-01-01 09:30:23
Dimethyl Ketoxime - Reference Information
| LogP | 0.077-0.2 at 22.7℃ |
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| chemical reaction | acetone oxime has strong reducibility and is easy to react with oxygen in feed water to reduce dissolved oxygen content in feed water. the reaction formula is as follows: 2C3H7NO O2 → 2C3H6CO N2O H2O and 4(CH3)2C = N-OH O2 → 4(CH3)2C = O 2N2 H2O. at the same time, acetone oxime also passivates with metal. the reaction formula is as follows: 2C3H7NO 6Fe2O3 → 2C3H6CO N2O 4Fe3O4 H2O acetone oxime can reduce the iron content of the feed water, prevent the boiler from overheating and corrosion damage of the metal pipe due to the formation of iron oxide deposits, and at the same time deposit in pipelines, economizers, etc. The corrosion products of copper have a cleaning effect, which is the reason why the copper content in the boiler water will increase significantly in the early use of acetone oxime. The decomposition products of acetone oxime are mainly nitrogen and water, and a small amount of formic acid, acetic acid and nitrogen oxides are generated. Under the premise of ensuring the deoxygenation effect, when the residual amount of DMKO in the feed water is controlled to be 5~40 μg/L, formic acid, acetic acid, Cl-, SO42 are not detected in all tested water vapor samples. At the same time, the NO2-and NO3-contents of some samples were detected, but none of them were detected. Therefore, the use of acetone oxime to remove oxygen has no adverse effect on the water vapor system. |
| passivator after boiler pickling | after boiler pickling, the metal surface activity is high, and a compact protective film needs to be generated on the metal surface with a passivator to prevent secondary corrosion of the metal. In the past, hydrazine, sodium nitrite, sodium tripolyphosphate, etc. were used as passivators. Although hydrazine and sodium sulfite have good passivation effect, the drug itself has obvious toxic and side effects on operators and users. The passivation solution is difficult to handle and pollutes the environment. Although the sodium tripolyphosphate passivation method has the advantages of simple process and easy treatment of waste liquid, it is easy to lead to low PH value of furnace water after the unit is started, which brings certain difficulties to water vapor quality monitoring and treatment. Experiments have proved that acetone oxime (dimethyl ketone oxime) can obtain satisfactory or better results instead of the above passivators. And has the advantages of less dosage, non-toxic emission and no pollution. General passivation parameters: concentration of purifier: 8000-900mg/l PH value of purified solution (ammonia adjustment):9.50-11 temperature of purified solution (atmospheric pressure cleaning system):85-90 purification time: 14-18h |
| deactivation of protective agent for thermal equipment | due to the strong reducibility of this product, its aqueous solution can form a good magnetized film on the surface of steel, thus effectively delaying the corrosion of thermal equipment during deactivation. with a solution containing acetone oxime (dimethyl ketoxime), wet protection of thermal equipment can obviously obtain corrosion inhibition effect. Concentration of protective solution: 350-400mg/l (pure water preparation) PH:>10.5 (ammonia adjustment) Attention should be paid during protection: 1. If the protective agent is lost due to sampling, it should be supplemented regularly by dosing equipment. 2. Sampling and testing once a week or half a month. If the protection concentration is stable and the oxygen and iron concentration drops slowly, it is normal. Otherwise, the cause should be found out. |
| Application | Acetone oxime is mainly used as chemical deoxidizer for feedwater in industrial boilers. Compared with traditional boiler chemical deoxidizer, it has the characteristics of less dosage, high deoxidizing efficiency, non-toxic, and no environmental pollution. It is the best medicine for deactivation protection and passivation treatment of subcritical boilers, it is also an ideal product to replace traditional chemical deoxidizers such as hydrazine in the feed water of medium and high pressure boilers. |
| Preparation | (1) Hydroxylamine sulfate method is obtained by the reaction of acetone and hydroxylamine sulfate. Hydroxylamine sulfate solution is slowly added dropwise to acetone, and the reaction temperature is controlled at 40~50 ℃. The oxime-treated reaction liquid is neutralized with 40% sodium hydroxide until alkaline (pH value is 7~8), cooled and filtered, the filtered crude product is added to zeolite, and the raw product is distilled at normal pressure to obtain crystalline acetone oxime. (2) in ammonia method, acetone, ammonia and hydrogen peroxide are used as raw materials, acetone is dissolved in isopropanol according to the dosage of 100~300g solvent/mol acetone, TS-1 catalyst is added according to the dosage of 3~10g catalyst/mol acetone and ammonia is added according to the dosage of 1.2~2mol ammonia/mol acetone to prepare reaction solution, and then under the pressure of 50~120 ℃ and 0.1 ~ 1.0MPa, according to the dosage of 1.0~1.3mol hydrogen peroxide/1mol acetone, hydrogen peroxide was slowly added dropwise for 0.25~12h to the above reaction solution to obtain acetone oxime product. |
| use | this product is used in organic synthesis. As an analytical reagent. For the determination of cobalt. It is the raw material of medicine, pesticide, dye and silicone coupling agent. It can also be used for analytical reagents to identify nickel, cobalt and other intermediates of caffeine, theophylline and SMD reagents for testing cobalt, organic synthesis, new boiler water deoxidizer, pharmaceutical and pesticide intermediates, etc. |
| Production method | is obtained by the reaction of acetone and hydroxylamine hydrochloride. Hydroxylamine hydrochloride solution was slowly added dropwise to acetone, and the reaction temperature was controlled at 40-50 ℃. The oxime-treated reaction liquid is neutralized with 40% sodium hydroxide until alkaline (pH7-8), cooled and filtered, the filtered crude product is added to zeolite, distilled at normal pressure, and cooled to obtain a crystalline finished product. |
| category | toxic substances |
| toxicity classification | poisoning |
| acute toxicity | oral-rat LD50: >500 mg/kg; Abdominal cavity-mouse LD50:4000 mg/kg |
| flammability hazard characteristics | open flame is combustible; high thermal decomposition emits nitrogen oxide gas |
| storage and transportation characteristics | warehouse ventilation and low temperature drying; Store separately from oxidants and acids |
| fire extinguishing agent | foam, carbon dioxide, dry powder, sand |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 02:00:06
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View History
Dimethyl Ketoxime
5-甲基噁戊环-3-胺盐酸
3-吡啶基三丁基锡烷
5-CHLORO-1-ADAMANTANONE
9-Fluorenone-1-carboxylic Acid
Einecs 281-913-3
1-[2-AMINO-1-(3-CHLORO-PHENYL)-ETHYL]-PYRROLIDINE-3-CARBOXYLIC ACID
2-羟基-3-甲氧基苄醇
HYDRIDOPOLYCARBOSILANE
6,6′-bis(hydroxymethyl)-2,2′-bipyridine
5-甲基噁戊环-3-胺盐酸
3-吡啶基三丁基锡烷
5-CHLORO-1-ADAMANTANONE
9-Fluorenone-1-carboxylic Acid
Einecs 281-913-3
1-[2-AMINO-1-(3-CHLORO-PHENYL)-ETHYL]-PYRROLIDINE-3-CARBOXYLIC ACID
2-羟基-3-甲氧基苄醇
HYDRIDOPOLYCARBOSILANE
6,6′-bis(hydroxymethyl)-2,2′-bipyridine
Raw Materials for Dimethyl Ketoxime
Downstream Products for Dimethyl Ketoxime