Name | 1-Naphthaldehyde |
Synonyms | alpha-Naphthal -Naphthaldehdye 1-Naphthaldehdye 1-Naphthaldehyde AKOS BBS-00003152 Naphthaldehyde, 1- ALPHA-NAPHTHALDEHYDE (alpha)Naphthaldehdye alpha-Naphthylaldehyde 1-naphthaldehyde (alpha) naphthalene-1-carbaldehyde Naphthalene-1-carboxaldehyde alpha-Naphthylcarboxaldehyde |
CAS | 66-77-3 |
EINECS | 200-633-4 |
InChI | InChI=1/C11H8O/c12-8-10-6-3-5-9-4-1-2-7-11(9)10/h1-8H |
InChIKey | SQAINHDHICKHLX-UHFFFAOYSA-N |
Molecular Formula | C11H8O |
Molar Mass | 156.18 |
Density | 1.15 g/mL at 25 °C (lit.) |
Melting Point | 1-2 °C (lit.) |
Boling Point | 160-161 °C/15 mmHg (lit.) |
Flash Point | >230°F |
Water Solubility | Soluble in ethanol, ether, acetone, benzene. Insoluble in water. |
Solubility | <1g/l |
Vapor Presure | 0.00188mmHg at 25°C |
Vapor Density | >1 (vs air) |
Appearance | Liquid |
Specific Gravity | 1.15 |
Color | Clear yellow to dark yellow-brown |
BRN | 386082 |
PH | 7 (< 1g/l, H2O, 20℃) |
Storage Condition | Keep in dark place,Sealed in dry,Room Temperature |
Sensitive | Air Sensitive |
Refractive Index | n20/D 1.652(lit.) |
Physical and Chemical Properties | Characteristic light yellow crystals. melting point 33~34 ℃ boiling point 160 ℃(1.995kPa) relative density 1.1503g/cm3 refractive index 1.6507 flash point> 110 ℃ solubility soluble in ethanol, ether, acetone. |
Use | For synthetic resin and medicine |
Risk Codes | R22 - Harmful if swallowed R36/37/38 - Irritating to eyes, respiratory system and skin. |
Safety Description | S37/39 - Wear suitable gloves and eye/face protection S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S24/25 - Avoid contact with skin and eyes. S36/37 - Wear suitable protective clothing and gloves. S23 - Do not breathe vapour. S36 - Wear suitable protective clothing. S16 - Keep away from sources of ignition. |
UN IDs | 3082 |
WGK Germany | 3 |
RTECS | QJ0190000 |
TSCA | Yes |
HS Code | 29122900 |
Packing Group | III |
NIST chemical information | information provided by: webbook.nist.gov (external link) |
EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
Use | 1-naphthalene formaldehyde is used as a reagent for the synthesis of a rare earth-free eco-energy lighting led phosphor. It is also used in the synthesis of 1-naphthalene formaldehyde and 1-naphthene ethanol. used in synthetic resin and medicine |
production method | 1. Preparation Method: In the reaction bottle equipped with stirrer, dropping funnel, ventilation tube (extending into the bottom of the reaction bottle), reflux condenser, add β-naphthoyl chloride (2)57g(0.3mol),200ml of metallic sodium-dried xylene, 6g of pd-baso4 catalyst. The air in the reaction flask was replaced with hydrogen. Hydrogen gas was introduced into the oil bath at 140-150 ° C. With vigorous stirring, and the aeration rate was 1-2 Bubbles/second. There is evolution of hydrogen chloride gas (available for alkali absorption). The reaction was completed in about 2H (as judged by testing for the presence or absence of hydrogen chloride evolution). It was cooled and the catalyst was filtered off. Decolorization of activated carbon. Xylene was distilled off. After that, the distillate was distilled under reduced pressure, and the fraction of 147-149 °c/2.0kPa was collected, cooled and then solidified to obtain 19g of β-naphthalene formaldehyde (1), mp59 -60 °c, with a yield of 80%. [1] 2. Preparation method: 400ml of anhydrous ether and 76g of anhydrous stannous chloride were added to a reaction bottle equipped with a stirrer, a dropping funnel, a ventilation conduit and a reflux condenser. Under cooling, dry hydrogen chloride gas was introduced until saturation, and the reaction liquid was separated into two layers. A solution of 30.6g(0.2mol) of β-naphthonitrile (2) in of anhydrous diethyl ether was added dropwise with stirring, followed by introduction of dry hydrogen chloride gas. The mixture was stirred rapidly and then left overnight. The solid was filtered off and washed with ether. The solid was added to another reaction flask, water was added, and steam distillation was performed. After cooling the distillate, a solid was precipitated. Suction filtration, drying, β-naphthalene formaldehyde (1)25g, yield 80%. Distillation was performed under reduced pressure, and a fraction of 156 to 158 ° C./2.0kPa was collected, cooled, and then solidified. mp57~58℃ [2] |