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18989-35-0

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18989-35-0 Usage

Description

2,6-bis(p-methylbenzylidene)cyclohexan-1-one, also known as bis(4-methylbenzylidene)cyclohexanone, is a chemical compound with the molecular formula C25H28O. It is a yellow crystalline solid that is commonly used as a photochromic material.
Used in Photochromic Lenses and Glasses:
2,6-bis(p-methylbenzylidene)cyclohexan-1-one is used as a photochromic material for its ability to undergo reversible photochemical reactions, transitioning between its colored and colorless forms in response to UV light exposure. This property makes it a useful component in photochromic eyewear that darkens in response to sunlight.
Used in Liquid Crystal and Organic Electronics:
2,6-bis(p-methylbenzylidene)cyclohexan-1-one is used as a photoresponsive component in liquid crystal and organic electronics due to its potential applications in these fields.

Check Digit Verification of cas no

The CAS Registry Mumber 18989-35-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,9,8 and 9 respectively; the second part has 2 digits, 3 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 18989-35:
(7*1)+(6*8)+(5*9)+(4*8)+(3*9)+(2*3)+(1*5)=170
170 % 10 = 0
So 18989-35-0 is a valid CAS Registry Number.
InChI:InChI=1/C22H22O/c1-16-6-10-18(11-7-16)14-20-4-3-5-21(22(20)23)15-19-12-8-17(2)9-13-19/h6-15H,3-5H2,1-2H3

18989-35-0SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 19, 2017

Revision Date: Aug 19, 2017

1.Identification

1.1 GHS Product identifier

Product name (2E,6Z)-2,6-bis[(4-methylphenyl)methylidene]cyclohexan-1-one

1.2 Other means of identification

Product number -
Other names 2,6-bis(4-methylbenzylidene)cyclohexanone

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:18989-35-0 SDS

18989-35-0Relevant articles and documents

Synthesis of lithium/cesium-Zagronas from zagrosian natural asphalt and study of their activity as novel, green, heterogeneous and homogeneous nanocatalysts in the Claisen–Schmidt and Knoevenagel condensations

Soleiman-Beigi, Mohammad,Ghalavand, Saba,Venovel, Hadis Gholami,Kohzadi, Homa

, p. 3267 - 3279 (2021/06/17)

A novel, heterogeneous and homogeneous basic nanocatalysts were synthesized by grafting of lithium and cesium on zagrosian natural asphalt sulfonate (Li/Cs-Zagronas). The activity of these catalysts was examined in the Claisen–Schmidt and Knoevenagel condensations under mild reaction conditions. Li/Cs-Zagronas were characterized by FT-IR spectroscopy, scanning electron microscopy, X-ray diffraction, energy-dispersive spectroscopy, inductively coupled plasma and thermogravimetric analysis techniques. These nanocatalysts were removed by simple filtration and reused several times without any deterioration of activity.

Potassium Natural Asphalt Sulfonate (K-NAS): Synthesis and characterization as a new recyclable solid basic nanocatalyst and its application in the formation of carbon–carbon bonds

Falah, Saeid,Soleiman-Beigi, Mohammad,Kohzadi, Homa

, (2020/07/06)

In this research, we synthesized and characterized a new heterogeneous basic nanocatalyst and its catalytic application was studied in the Claisen-Schmidt and Knoevenagel condensations. In order to prepare this nanocatalyst, first, the Iranian natural asphalt was sulfonated with the concentrated sulfuric acid and then, converted to the potassium natural asphalt sulfonate (K-NAS). In order to characterization of the nanocatalyst, used of FT-IR spectroscopy, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), inductively coupled plasma (ICP) and thermogravimetric analysis (TGA) techniques. This new basic heterogeneous nanocatalyst have advantages such as being eco-friendly, huge specific surface area, high reactivity and recyclability.

Sulfonated PEG-intercalated montmorillonite [(Mt/PEG)-SO3H] as efficient and ecofriendly nanocatalyst for synthesis of α,α′-bis(substituted benzylidene)cycloalkanones

Dalil Heirati, Seyedeh Zahra,Shirini, Farhad,Fallah Shojaei, Abdollah

, p. 6167 - 6186 (2017/10/05)

(Montmorillonite/PEG)-SO3H nanocomposite was successfully prepared for the first time and introduced as a solid acid nanocatalyst. Initially, polyethylene glycol (PEG) polymeric chains were intercalated into interlayer spaces of montmorillonite. The resulting Mt/PEG nanocomposite with good mechanical and thermal stability was chosen as a useful clay mineral/polymer support for further modification with chlorosulfonic acid. Structural characterization of (Mt/PEG)-SO3H was carried out using X-ray diffraction (XRD) analysis, Brunauer–Emmett–Teller (BET) measurements, Barrett–Joyner–Halenda (BJH) analysis, scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and Fourier-transform infrared (FT-IR) spectroscopy. The results showed that PEG chains were intercalated into the clay mineral layers and that the Mt/PEG nanocomposite was successfully sulfonated. (Mt/PEG)-SO3H nanocomposite exhibited high specific surface area and good stability up to around 150?°C, showing excellent potential for application as a recyclable nanocatalyst. (Mt/PEG)-SO3H was used as an efficient and ecofriendly solid acid nanocatalyst for preparation of α,α′-bis(substituted benzylidene)cycloalkanones under solvent-free conditions, leading to many interesting findings. The excellent conversion values confirm that the catalyst has strong and sufficient acidic sites, which are responsible for its catalytic performance. The reaction under mild conditions (room temperature) with excellent yield, catalyst recyclability (up to ten times), and simple work-up procedure represent useful advantages of (Mt/PEG)-SO3H for catalysis. Moreover, the reaction could be scaled up to 10 and 15?mmol scales.

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