2646-17-5 Usage
Description
Solvent Orange 2, also known as 1-o-Tolueneazo-2-naphthol, is a red-orange dye with a melting point of 131°C. It is available in the form of red needles or orange powder and sublimates above 374°F. The dye exhibits light fastness and heat resistance, with good stability in the presence of sodium carbonate (5%) and hydrochloric acid (5%).
Uses
Used in Oil Product Coloring:
Solvent Orange 2 is used as a coloring agent in the oil product industry due to its red-orange hue and stability under various conditions.
Used in Ink Production:
The dye is also utilized in the production of inks, where its color properties and stability contribute to the quality of the final product.
Used in Cultural and Educational Supplies Coloring:
Solvent Orange 2 is employed as a coloring agent in the manufacturing of cultural and educational supplies, such as art materials and teaching aids, to provide vibrant and long-lasting colors.
Chemical Properties:
Solvent Orange 2 is characterized by its red needles or powder form. It is slightly soluble in ethanol, acetone, and benzene, producing an orange-red solution in ethanol. In concentrated sulfuric acid, it turns red light purple, which becomes a big red upon dilution and results in red precipitation. When mixed with dilute hydrochloric acid, the color changes slightly, while mixing with dilute sodium hydroxide solution yields a brown light orange color.
Preparation
O-Methylaniline diazotization, and Naphthalen-2-ol coupling.
Air & Water Reactions
Azo dyes can be explosive when suspended in air at specific concentrations. Insoluble in water.
Reactivity Profile
Solvent Orange 2 is an azo compound. Azo, diazo, azido compounds can detonate. This applies in particular to organic azides that have been sensitized by the addition of metal salts or strong acids. Toxic gases are formed by mixing materials of this class with acids, aldehydes, amides, carbamates, cyanides, inorganic fluorides, halogenated organics, isocyanates, ketones, metals, nitrides, peroxides, phenols, epoxides, acyl halides, and strong oxidizing or reducing agents. Flammable gases are formed by mixing materials in this group with alkali metals. Explosive combination can occur with strong oxidizing agents, metal salts, peroxides, and sulfides.
Fire Hazard
Flash point data for Solvent Orange 2 are not available; however Solvent Orange 2 is probably combustible.
Safety Profile
Confirmed carcinogen
with experimental carcinogenic and
neoplastigenic data. Poison by intravenous
route. Mildly toxic by ingestion. Mutation
data reported. When heated to
decomposition it emits toxic fumes of NOx.
Used to color cosmetics, varnishes, oils, fats
and waxes, petroleum products.
Standard
Light Fastness
Melting point
Stable
ISO
Good-General
Check Digit Verification of cas no
The CAS Registry Mumber 2646-17-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,6,4 and 6 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 2646-17:
(6*2)+(5*6)+(4*4)+(3*6)+(2*1)+(1*7)=85
85 % 10 = 5
So 2646-17-5 is a valid CAS Registry Number.
InChI:InChI=1/C17H14N2O/c1-12-6-2-5-9-15(12)18-19-17-14-8-4-3-7-13(14)10-11-16(17)20/h2-11,18H,1H3/b19-17-
2646-17-5Relevant articles and documents
An environmentally friendly approach to the green synthesis of azo dyes with aryltriazenes via ionic liquid promoted C-N bonds formation
Zhang, Yonghong,Liu, Yonghong,Ma, Xiaoqian,Ma, Xia,Wang, Bin,Li, Hongguang,Huang, Yan,Liu, Chenjiang
, p. 438 - 444 (2018/06/14)
An efficient and green approach for the synthesis of azo dyes has been developed via the Br?nsted acidic ionic liquid (IL) promoted diazo coupling reaction of naphthols with aryltriazenes. The reaction was carried out with the aryltriazenes as diazotizing
Convenient and rapid diazotization and diazo coupling reaction via aryl diazonium nanomagnetic sulfate under solvent-free conditions at room temperature
Koukabi, Nadiya,Otokesh, Somayeh,Kolvari, Eskandar,Amoozadeh, Ali
, p. 12 - 17 (2015/10/05)
For the first time, nanomagnetic-supported sulfonic acid is used for conversion of several types of aromatic amine, containing electron-withdrawing groups as well as electron-donating groups to the corresponding azo dyes in excellent yield. The synthesis of these compounds is described by the sequential diazotization-diazo coupling of various aromatic amines with sodium nitrite, nanomagnetic supported sulfonic acid and coupling agents under solvent-free conditions at room temperature. This new method offers several advantages including short reaction time, mild reaction conditions, avoidance of harmful acids, and simple work-up procedure. More importantly, aryldiazonium salts supported on magnetic nanoparticles (aryl diazonium nanomagnetic sulfate) were sufficiently stable to be kept at room temperature in the dry state.
New dry arenediazonium salts, stabilized to an exceptionally high degree by the anion of o-benzenedisulfonimide
Barbero, Margherita,Crisma, Marco,Degani, Lacopo,Fochi, Rita,Perracino, Paolo
, p. 1171 - 1175 (2007/10/03)
Arenediazonium o-benzenedisulfonimides 3 (20 examples, yield >90%) were prepared in the dry state by diazotization of aromatic amines with (-pentyl nitrite and o-benzenedisulfonimide in glacial acetic acid or formic acid at 0-5°C. Unlike most diazonium salts in the dry state, salts 3 are very highly stable.
