472-41-3

Basic information

• Product Name: p-(3,4-dihydro-2,2,4-trimethyl-2H-1-benzopyran-4-yl)phenol
• Synonyms: p-(3,4-dihydro-2,2,4-trimethyl-2H-1-benzopyran-4-yl)phenol;4-(3,4-DIHYDRO-2,2,4-TRIMETHYL-2H-1-BENZOPYRAN-4-YL)PHENOL;Chroman I;2,2,4-Trimethyl-4-(4-hydroxyphenyl)-3,4-dihydro-2H-1-benzopyran;2,2,4-Trimethyl-4-(4-hydroxyphenyl)chroman;2,2,4-Trimethyl-4-(p-hydroxyphenyl)chroman;4-(2,2,4-Trimethyl-3,4-dihydro-2H-1-benzopyran-4-yl)phenol;4-(p-Hydroxyphenyl)-2,2,4-trimethylchroman
• CAS NO: 472-41-3
• Molecular Formula: C₁₈H₂₀O₂
• Molecular Weight: 268.3502
• EINECS: 207-450-9
• Mol File: 472-41-3.mol
• Article Data: 2

Chemical Properties

• Melting Point: 140℃
• Boiling Point: 390.7 °C at 760 mmHg
• Flash Point: 166.7 °C
• Appearance: /
• Density: 1.087 g/cm³
• Vapor Pressure: 3.42E-06mmHg at 25°C
• Refractive Index: 1.56
• Storage Temp.: Inert atmosphere,Room Temperature
• Solubility: Chloroform (Slightly), Methanol (Slightly)
• PKA: 10.02±0.30(Predicted)
• CAS DataBase Reference: p-(3,4-dihydro-2,2,4-trimethyl-2H-1-benzopyran-4-yl)phenol(CAS DataBase Reference)
• NIST Chemistry Reference: p-(3,4-dihydro-2,2,4-trimethyl-2H-1-benzopyran-4-yl)phenol(472-41-3)
• EPA Substance Registry System: p-(3,4-dihydro-2,2,4-trimethyl-2H-1-benzopyran-4-yl)phenol(472-41-3)

Safety Data

• Hazardous Substances Data: 472-41-3(Hazardous Substances Data)

Usage

General Description

p-(3,4-dihydro-2,2,4-trimethyl-2H-1-benzopyran-4-yl)phenol, also known as butylated hydroxytoluene (BHT), is a synthetic antioxidant commonly used in food and cosmetic products to prevent oxidation and extend shelf life. It is a phenolic compound with a molecular structure consisting of a phenol group attached to a 2,2,4-trimethyl-2H-1-benzopyran-4-yl group. BHT is known for its ability to inhibit the formation of free radicals and has been studied for its potential health benefits, including its anti-inflammatory and anti-cancer properties. However, there are also concerns about its potential toxicity and its safety for consumption, leading to varying regulations on its use in different countries.

InChI:InChI=1/C18H20O2/c1-12-15-6-4-5-7-16(15)20-18(2,3)17(12)13-8-10-14(19)11-9-13/h4-12,17,19H,1-3H3

Upstream product

• 141-79-7 4-methyl-pent-3-en-2-one 
• 108-95-2 phenol 
• 298-00-0 parathion-methyl 
• 88252-69-1 4-(2-hydroxy-phenyl)-2-methyl-pent-3-en-2-ol 
• 80-05-7 BPA 
• 628-13-7 pyridine hydrochloride 
• 17937-04-1 2,2,4-trimethyl-2H-benzopyran 

Downstream Products

• 19814-64-3 3,6,9,9-tetramethylxanthene 
• 108-95-2 phenol 
• 1448582-44-2 C₁₈H₂₀O₂*C₁₈H₂₀OS 
• 121624-90-6 4-(3-chloroacetyl-4-hydroxyphenyl)-2,2,4-trimethylchroman 
• 121624-89-3 4-(3-acetyl-4-hydroxyphenyl)-2,2,4-trimethylchroman 
• 121624-92-8 4-(3-amino-4-hydroxyphenyl)-2,2,4-trimethylchroman 
• 120-80-9 benzene-1,2-diol 
• 121624-88-2 4-(4-chloroacetoxyphenyl)-2,2,4-trimethylchroman 
• 121624-96-2 4-(3-formyl-4-hydroxyphenyl)-2,2,4-trimethylchroman 
• 99249-80-6 4-(4-acetoxyphenyl)-2,2,4-trimethylchroman 
• 121624-91-7 4-(3-benzeneazo-4-hydroxyphenyl)-2,2,4-trimethylchroman 
• 109400-42-2 4-(4-Methoxy-phenyl)-2,2,4-trimethyl-chroman 

Relevant articles and documents

Photolysis of methyl-parathion thin films: Products, kinetics and quantum yields under different atmospheric conditions

The present study focuses on the photodegradation of methyl-parathion thin films, an organophosphate insecticide, under different atmospheric conditions. The latter include nitrogenated, oxygenated and ozonated atmospheres, under low and high relative humidity conditions. Addition of oxygen to the atmospheric mixture did not seem to affect the reaction rates and quantum yields. Relative humidity affect was minor, with a small enhancement in reaction rate under 254. nm radiation. The addition of ozone (to either dry or humid atmosphere), at all concentrations tested, largely enhanced degradation rates. In the absence of ozone, the obtained quantum yields for photolysis of methyl-parathion thin films under 254 and 313. nm were 0.024 ± 0.007 and 0.012 ± 0.005, respectively. These values are higher than the values previously reported for solutions of methanol and water. Although the presence of molecular oxygen and water vapors did not seem to affect much the reaction rates, it did have a certain effect on the resulted products. More polar products were obtained under oxygenated and ozonated atmospheres, as well as dimers under ozone conditions. The reaction on thin films has yielded more toxic products than usually found in solutions, adding alkylphosphate esters in addition to the oxons formed normally.