Name | n-Docosane |
Synonyms | Docosane NSC 77139 n-Docosane Twenty-two alkyl Docosane [Standard Material] Docosane [Standard Material for GC] |
CAS | 629-97-0 |
EINECS | 211-121-5 |
InChI | InChI=1/C22H46/c1-3-5-7-9-11-13-15-17-19-21-22-20-18-16-14-12-10-8-6-4-2/h3-22H2,1-2H3 |
InChIKey | HOWGUJZVBDQJKV-UHFFFAOYSA-N |
Molecular Formula | C22H46 |
Molar Mass | 310.6 |
Density | 0.778g/mLat 25°C(lit.) |
Melting Point | 42-45°C(lit.) |
Boling Point | 369°C(lit.) |
Flash Point | >230°F |
Water Solubility | Insoluble in water. Soluble in alcohol. |
Solubility | Not soluble in water. |
Vapor Presure | <1 mm Hg ( 21.1 °C) |
Vapor Density | 10.8 (vs air) |
Appearance | Colorless crystalline solid |
Specific Gravity | 0.778 |
Color | White |
BRN | 1702206 |
Storage Condition | room temp |
Stability | Stable. Combustible. Incompatible with strong oxidizing agents. |
Refractive Index | 1.4455 |
MDL | MFCD00009348 |
Hazard Symbols | Xi - Irritant |
Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
WGK Germany | 3 |
TSCA | Yes |
HS Code | 29011000 |
Reference Show more | 1. Du Peng, Zou Junbo, Zhang Xiaofei, etc. Study on extraction kinetics of volatile oil from notopterygii radix by steam distillation [J]. China pharmacist, 2019, 022(006):1003-1006. 2. Zoujunbo, Zhang Xiaofei, Shi Runjun, etc. Study on extraction kinetics of volatile components in turmeric by steam distillation [J]. Chinese Journal of Traditional Chinese Medicine, 2020, v.35(03):153-158. 3. Zangjia, zoujunbo, Shi Junjun, etc. GC-MS analysis of oil-water distribution in the process of extraction of volatile oil from Acorus tatarinowii Schott by steam distillation [J]. Chinese herbal medicine, 202051 Volume 1, pages 59-66 ISTIC PKU CSCD CA 2020. 4. Zoujunbo, Zhang Xiaofei, Zang Jia, etc. Study on extraction kinetics of volatile oil from fennel by steam distillation [J]. Chinese herbal medicine, 2018, 49(012):2855-2865. 5. Zoujunbo, Zhang Xiaofei, Zang Jia, etc. Study on extraction kinetics of volatile oil from Alpinia officinarum Hance by steam distillation [J]. Chinese Journal of Traditional Chinese Medicine, 2018, 43(21). 6. Wei Hao, Zoujunbo, Zhang Xiaofei, et al. Analysis of oil and water distribution in the process of steam distillation extraction of volatile oil from Dalbergia odorifera [J]. Chinese herbal medicine, 2019, v.50;No.651(16):49-58. |
LogP | 11.47 at 25℃ |
EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
Introduction | n-dioxane is one of the important chemical reagents needed in the process of oil analysis. At the same time, it is also one of the key components of the Environmental Protection liquid combustion composition, and it is widely used because it can adjust the formula of the Environmental Protection liquid combustion composition and ensure its excellent quality. |
Application | n-dioxane is a kind of n-alkanes, n-alkanes as diesel oil, one of the key components of low temperature improvement and environmental protection liquid fuel composition, has been widely used, at the same time, n-alkane monomer in geology, crude oil, atmospheric particulate matter and organic matter analysis also play an extremely important role. |
preparation method | (1). 1650.5g(10mol) of n-bromohexane and 3053.5g(10mol) of n-bromodecane are mixed uniformly to form a mixture of bromoalkanes, which is ready for use;(2). Weigh 483g(21mol) of metallic sodium and cut it into small thin strips with an area of approximately 1 × 3 cm2 for use;(3). Put 50g of bromoalkane mixture and 20g of sodium metal in the reaction kettle, stir and raise the temperature to 80 ℃, remove the heat source, rely on reaction heating, and maintain it at 120 ℃, the remaining mixture of bromoalkane is continuously added dropwise, and the remaining metal sodium is added to maintain a slightly refluxing state. After the addition is completed, the temperature is controlled at 160 ° C. And the temperature is constant for 2 hours;(4). Add 400g of 95% ethanol and 260 ml of water successively, separate the organic matter, wash with water until neutral, dry with anhydrous magnesium sulfate, and collect the fraction of 280 ~ ℃ by distillation, the distillate was washed with 600g of concentrated potassium sulfate until the acid layer was pale yellow. The organic phase was washed with water until neutral, dried, and collected through a fractionation column to obtain 96% G of N-dodecane and 98% G of N-dioxane. 96% ~ 98%. Wherein, the molar ratio of n-hexane bromide to N-decane bromide is 1:1, the reaction kettle is a three-piece flask composed of a stirrer, a separating funnel and a reflux condenser, and the strong oxidant is concentrated sulfuric acid or acidic potassium permanganate. |
Use | gas chromatographic analysis standard. Organic Synthesis, calibration and temperature sensitive equipment |
toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |