Acid Blue CAS 3844-45-9 Erioglaucine Disodium Salt Oral Care

• Customization: Available
• CAS No.: 3844-45-9
• Formula: C37h37n2nao9s3
• Model NO.: CAS 3844-45-9
• EINECS: 223-339-8
• Type: Synthesis Material Intermediates
• Appearance: Powder
• Quality: Industrial
• Colour: Blue
• Transport Package: Drum
• Specification: 99%
• Trademark: Puyer
• Origin: China
• Production Capacity: 100000kg/Month

Product Description

Product Description

Brilliant Blue FCF (Erioglaucine Disodium Salt)

Chemical Name: Bis[4-(N-ethyl-N-3-sulfonatobenzyl)aminophenyl]-2-sulfonatophenylmethylium disodium salt
CAS No.: 3844-45-9
Molecular Weight: 792.85 g/mol
Synonyms:

• Acid Blue 9

• FD&C Blue No. 1

• E133 (EU food additive code)

• C.I. 42090

 

Key Properties

• Appearance: Dark purple to bronze crystalline powder with a metallic sheen

• Solubility:

  • Highly soluble in water (18.7 g/100 mL at 21°C) 

  • Soluble in ethanol (1.5 g/100 mL), glycerol, and propylene glycol 

• Color Characteristics:

  • Neutral pH: Bright blue (λmax = 625 nm) 

  • Acidic conditions: Green to yellow 

  • Alkaline conditions: Purple (when boiled) 

• Stability: Resistant to heat, light, and pH changes (except strong acids/bases) 

 

Production Methods

1. Synthesis Process:

   • Condensation of benzaldehyde-2-sulfonic acid with N-ethyl-N-(3-sulfobenzyl)aniline 

   • Oxidation with sodium dichromate or lead dioxide 

2. Aluminum Lake Form (Insoluble Pigment):

   • Prepared by precipitating Brilliant Blue with aluminum hydroxide 

 

Applications

1. Food Industry

• Common Uses:

  • Beverages (juices, sodas), candies, ice cream, baked goods 

  • Often blended with Tartrazine (Yellow 5) to produce green shades 

• Regulatory Limits (China, GB 2760):

  • 0.025 g/kg in beverages, candies, ice cream 

  • 0.10 g/kg in red/green decorative strips 

2. Pharmaceuticals & Cosmetics

• Tablet coatings, syrups, toothpaste, shampoos 

3. Laboratory Use

• Standard reference for synthetic dye analysis

Detailed Photos