4,4-DIMETHYL
4,4-DIMETHYLOXAZOLIDINE
CAS: 51200-87-4
Molecular Formula: C5H11NO
4,4-DIMETHYL - Names and Identifiers
4,4-DIMETHYL - Physico-chemical Properties
| Molecular Formula | C5H11NO |
| Molar Mass | 101.15 |
| Density | 0.942 g/mL at 25 °C |
| Boling Point | 189.55°C (rough estimate) |
| Flash Point | 120 °F |
| Storage Condition | 2-8℃ |
| Refractive Index | 0 |
| Use | Use 4, 4-dimethyloxazoline is an organic intermediate obtained by the reaction of isobutyl carbamate with PhI(OAc)2. It has been reported in the literature that it can be used to prepare bromodomain inhibitors. |
4,4-DIMETHYL - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | R10 - Flammable R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S16 - Keep away from sources of ignition. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
| UN IDs | 1993 |
4,4-DIMETHYL - Determination of dimethyl oxazolidine preservatives in cosmetics by high performance liquid chromatography with pre-column derivatization
from VIP Journal Professional Edition
Author:
Wang Qiang , look for , Huang Jinfeng , Lu Jian , Guo xindao , Wu chusen
Abstract:
A method for the determination of dimethyl oxazolidine preservatives in cosmetics by high performance liquid chromatography (HPLC) with pre-column derivatization was developed. The samples were extracted with 50% acetonitrile solution, derivatized with 9-fluorenylmethyl carbonyl chloride before column, and separated on a RRHD-C18(2.1 × 50 × 1.7 μm) column, high performance liquid chromatography-diode array detector, retention time and UV absorption spectrum qualitative, external standard method. The results showed that the calibration curves were linear in the range of 1.00~20.0 mg/L with correlation coefficients more than 0.9990; the limits of detection and quantification were 6.50 mg/kg and 20.0 mg/kg, respectively. The average recoveries ranged from 83.4% to 99.6%, and the intra-day and inter-day precision (RSD,n = 6) were 2.1%-6.7% and 5.0%-7.8%, respectively. The detection limit, recovery rate and precision of the method can meet the determination requirements of dimethyl oxazolidine preservatives in cosmetics.stowed
Key words:
high performance liquid chromatography (HPLC) cosmetics preservatives dimethyloxazolidine
DOI:
CNKI:SUN:XLXJ.0.2018-06-014
year:
2018
Last Update：2024-01-02 23:10:35
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View History
4,4-DIMETHYL
455-36-7
20870-77-3
295-14-7
18155-23-2
121-70-0
616-03-5
55965-84-9
83766-52-3
bis-(2-ethoxyethyl) ether
455-36-7
20870-77-3
295-14-7
18155-23-2
121-70-0
616-03-5
55965-84-9
83766-52-3
bis-(2-ethoxyethyl) ether