83-56-7 Usage
Description
1,5-Dihydroxy naphthalene is an organic compound that serves as a crucial intermediate in various chemical processes and industries. It is characterized by the presence of two hydroxyl groups attached to a naphthalene ring, which provides it with unique chemical properties and reactivity.
Uses
Used in Dye Industry:
1,5-Dihydroxy naphthalene is used as an intermediate for the synthesis of mordant azo dyes, which are essential for producing a wide range of vibrant and colorfast dyes used in textiles, plastics, and other materials.
Used in Organic Synthesis:
1,5-Dihydroxy naphthalene is utilized as a key building block in the synthesis of various organic compounds, including pharmaceuticals, agrochemicals, and other specialty chemicals. Its unique structure allows for a variety of chemical reactions, making it a versatile component in organic synthesis.
Used in Pharmaceutical Industry:
As an intermediate in the synthesis of pharmaceuticals, 1,5-Dihydroxy naphthalene plays a significant role in the development of new drugs and therapeutic agents. Its chemical properties enable the creation of novel molecular structures with potential medicinal applications.
Used in Photographic Industry:
1,5-Dihydroxy naphthalene is employed in the photographic industry as a component in the development of photographic films and papers. Its chemical properties contribute to the formation of stable images and enhance the overall quality of photographic products.
Purification Methods
The diol (~30g) is purified by making into a thick paste with H2O and suspending this in 3L of H2O containing 200mL of EtOH, boiling under reflux for 3hours, cooling to 30o, saturating with SO2, digesting below the boiling point for 1hour and filtering fast through a large hot filter paper. The hot filtrate is poured onto crushed ice whereby the diol (15-20g) separates as colourless needles (m 258o) [Wheeler & Ergle J Am Chem Soc 52 4873 1930]. Recrystallise it from H2O or nitromethane under N2 to avoid oxidation. The dibenzoyl derivative has m 245o (from EtOH). The 5-methoxy-1-naphthol derivative [prepared from the diol in MeOH/HCl (1:30 weight to volume ratio) and set aside at 25o for 9-10days] crystallised from pet ether (m 135-136o) or from CH2Cl2/hexane (needles m 140o) [Bell & McCaffrey Aust J Chem 46 731 1993]. [Beilstein 6 I 477, 6 II 950, 6 III 5265, 6 IV 6554.]
Check Digit Verification of cas no
The CAS Registry Mumber 83-56-7 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 8 and 3 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 83-56:
(4*8)+(3*3)+(2*5)+(1*6)=57
57 % 10 = 7
So 83-56-7 is a valid CAS Registry Number.
InChI:InChI=1/C10H8O2/c11-9-5-1-3-7-8(9)4-2-6-10(7)12/h1-6,11-12H
83-56-7Relevant articles and documents
A 1,5-dihydroxynaphthalene preparation method
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Paragraph 0050, (2017/03/14)
The invention provides a preparation method of 1,5-dihydroxy naphthalene. The preparation method comprises the following steps: after sulfonation reaction between refined naphthalene and sulfonating agents, salting out to obtain reaction solid and reaction liquid; in the presence of catalysts, heating the reaction solid obtained in the former step, water and inorganic strong alkali to react to obtain1,5-dihydroxy naphthalene, wherein the catalysts are one or more of methanol, ethanol and propanol. The preparation method provided by the invention has the beneficial effects that the reaction temperature in the alkali fusion step in the 1,5-dihydroxy naphthalene production process is reduced, thus reducing the requirements of equipment and reducing the danger coefficient in actual production, so that the reaction conditions are mild and the preparation method is easy to operate.
Production of martite nanoparticles with high energy planetary ball milling for heterogeneous Fenton-like process
Rahmani, Amir,Khataee, Alireza,Kaymak, Baris,Vahid, Behrouz,Fathinia, Mehrangiz,Dindarsafa, Mahsa
, p. 81219 - 81230 (2016/09/09)
Natural martite microparticles (NMMs) were prepared with a high energy planetary ball mill to form a nanocatalyst for a Fenton-like process. Martite nanoparticles (MNs) of different scales are formed when the milling time ranges from 1 to 5 h at the milling speed of 300 rpm. The catalytic performances of MNs are higher than the NMMs for the degradation of acid blue 5 (AB5) in a heterogeneous Fenton-like process. The NMMs and the MNs were characterized by SEM, EDX, BET, XRD and FT-IR analyses. The size distribution of the 5 h milled martite nanoparticles (MN3) is in the range of 20 nm to 100 nm, and these have the highest surface area (19.23 m2 g-1). The influence of the main operational parameters, including initial pH, MN3 dosage, H2O2 and initial dye concentration, were investigated on the AB5 degradation. The treatment process obeys pseudo first order kinetics and some of the degradation intermediates were recognized by the GC-MS method. The environmentally-friendly production of the MNs, low amount of leached iron and repeated catalyst usage are the significant advantages of this research. Finally, an artificial neural network (ANN) is expanded to estimate the degradation efficiency of AB5 on the basis of the experimental results, which indicates the appropriate performance (R2 = 0.955).
An efficient method for demethylation of aryl methyl ethers
Zuo, Li,Yao, Shanyan,Wang, Wei,Duan, Wenhu
, p. 4054 - 4056 (2008/09/20)
A new efficient method for demethylation of aryl methyl ethers using iodocyclohexane in DMF under reflux condition is described.