Variamine blue b

• CAS: 3566-44-7
• Catalog Number: ACM3566447
• Category: Main Products
• Molecular Weight: 250.73
• Molecular Formula: C₁₃H₁₄N₂O·HCl
• Synonyms: Variamine Blue B Base, A0647_SIGMA, CID77108, EINECS 222-652-7, SBB003144, N-(p-Methoxyphenyl)-p-phenylenediamine, 4-AMINO-4-METHOXYDIPHENYLAMINE HCl, 4-Amino-4-methoxydiphenylamine hydrochloride, N-(4-Methoxyphenyl)benzene-1,4-diamine monohydrochloride, N-(4-Methoxyphenyl)-1,4-benzenediamine hydrochloride, 1,4-Benzenediamine, N-(4-methoxyphenyl)-, monohydrochloride, 3566-44-7
• IUPAC Name: 1-N-(4-methoxyphenyl)benzene-1,4-diamine hydrochloride
• SMILES: COC1=CC=C(C=C1)NC2=CC=C(C=C2)N.Cl
• InChI Key: HPQQXLXIGHOKNZ-UHFFFAOYSA-N
• Boiling Point: 388.7ºC at 760mmHg
• Melting Point: 249-255ºC(lit.)
• Flash Point: 188.9ºC
• Density: 1.178g/cm³
• Appearance: Grey-blue crystalline powder
• EC Number: 222-652-7
• Exact Mass: 250.08700
• Hazard Statements: T: Toxic
• H-Bond Acceptor: 3
• H-Bond Donor: 3
• Packing Group: III
• Safety Description: 36/37/39-45
• WGK Germany: 3

Case Study

Variamine Blue B as a High-Performance Corrosion Inhibitor for Brass in Saline Environments

Keleş, Hülya, et al. Arabian journal of chemistry 12.2 (2019): 236-248.

This case study examines Variamine Blue B (4-Amino-4'-Methoxydiphenylamine-Diazonium Chloride, VBB), an organic corrosion inhibitor, for protecting Cu-35Zn brass alloy in 3.5% NaCl environments. The research demonstrates VBB's exceptional performance under elevated temperatures and its persistent protective mechanism.
Methodology: This work evaluated VBB's inhibition efficiency, adsorption behavior, and protective film stability on brass in saline solution across temperatures (298-328 K) using electrochemical and surface characterization techniques.
Key Findings
· Exceptional Inhibition Efficiency: Achieved 95.9% (polarization) and 95.1% (EIS) efficiency at 328 K. Performance improved with rising temperature (298 → 328 K). Simultaneously suppressed anodic dissolution and cathodic reactions.
· Adsorption mechanism followed Langmuir adsorption isotherm: Dominant physisorption at low concentrations, with chemical contributions at higher doses. Negative ΔG°ads values confirmed spontaneous, stable adsorption.
· Persistent Protective Film:SEM showed smoother surfaces vs. uninhibited controls after 120h exposure. Attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) detected intact VBB molecules on brass after 120h.

Variamine Blue B Enabling Robust, Process-Tolerant Surface Modification of Ti6Al4V Alloy

Sandomierski, Mariusz, et al. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 191 (2018): 27-35.

Ti6Al4V alloy is the most commonly used endoprosthesis material in the orthopedic industry, but lacks wear resistance. This work demonstrated the unique advantages of Variamine Blue B (VBB) salt for creating stable organic coatings on Ti6Al4V. The study aimed to evaluate VBB's efficacy in forming adherent organic layers on Ti6Al4V under varied reaction conditions (temperature, reducing agents) and assess coating stability in physiologically relevant simulated body fluid (SBF).
Preparation
First, the Ti6Al4V alloy was annealed in a furnace at 100 °C, 200 °C, 300 °C, 400 °C, 500 °C, and 600 °C for 15 h to preliminarily prepare titanium oxide on the alloy surface. VBB salt (0.1g) was directly mixed with Ti6Al4V (1g) in distilled water under four conditions: room temperature (RT) or 50°C, with/without ascorbic acid, compared against in-situ generated 4-hydroxymethylbenzenediazonium (4-HMBD) cations; modified alloys were filtered until clear.
Key Findings
VBB formed complete organic layers regardless of temperature (RT/50°C) or ascorbic acid presence, ontrasting with 4-HMBD, which required elevated temperatures for optimal deposition. VBB coatings exhibited uniform coverage (validated by SEM/EDX/Raman), tolerance to surface TiO2, and remained fully intact after SBF exposure with no delamination.

Custom Q&A

What is the molecular formula of Variamine Blue B?

The molecular formula of Variamine Blue B is C13H15ClN2O.

What are the synonyms for Variamine Blue B?

The synonyms for Variamine Blue B are 3566-44-7, 1,4-Benzenediamine, N-(4-methoxyphenyl)-, monohydrochloride, and 4-Amino-4'-methoxydiphenylamine hydrochloride.

What is the molecular weight of Variamine Blue B?

The molecular weight of Variamine Blue B is 250.72 g/mol.

What is the parent compound of Variamine Blue B?

The parent compound of Variamine Blue B is 1,4-Benzenediamine, N-(4-methoxyphenyl)-.

What is the IUPAC name of Variamine Blue B?

The IUPAC name of Variamine Blue B is 4-N-(4-methoxyphenyl)benzene-1,4-diamine hydrochloride.

What is the InChI of Variamine Blue B?

The InChI of Variamine Blue B is InChI=1S/C13H14N2O.ClH/c1-16-13-8-6-12(7-9-13)15-11-4-2-10(14)3-5-11;/h2-9,15H,14H2,1H3;1H.

What is the InChIKey of Variamine Blue B?

The InChIKey of Variamine Blue B is HPQQXLXIGHOKNZ-UHFFFAOYSA-N.

What is the CAS number of Variamine Blue B?

The CAS number of Variamine Blue B is 3566-44-7.

What is the EC number of Variamine Blue B?

The EC number of Variamine Blue B is 222-652-7.

What is the physical description of Variamine Blue B?

Variamine Blue B is described as a solid according to the Sigma-Aldrich MSDS.