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FDC Blue #2, Food Blue 1, Indigo Carmine
Indigo Carmine, also known as FDC Blue #2 or Food Blue 1, is a water-soluble organic dye derived from indigo through aromatic sulfonation. Approved for use as a food colorant in the United States and European Union, it imparts a vibrant blue hue. Additionally, it serves as a pH indicator, transitioning from blue at pH 11.4 to yellow at 13.0. Its versatility extends to being a redox indicator, turning yellow upon reduction, and a dissolved ozone indicator. Applications range from food coloring to surgical and biological staining. Its EC Number is 212-728-8, CAS Number is 860-22-0, Molecular Weight is 466.35, and Color Index Number is 73015.
Key Features
- Vibrant blue colorant for food and industrial use
- Water-soluble and organic
- Acts as pH indicator and redox indicator
- Also functions as a dissolved ozone indicator
- Approved for use in the US and EU
Product Specifications:
| Property | Value |
| EC Number | 212-728-8 |
| CAS Number | 860-22-0 |
| Molecular Weight | 466.35 |
| Color Index Number | 73015 |
Similar Products:
- Blue Organic Dye
- Water-Soluble Food Colorant
- pH Indicator Solution
- Redox Indicator Dye
- Ozone Indicator Solution
Note: These are similar products, and each product is different, so research is required to find the best fit for your needs.
Perfect for Food and Beverage Manufacturers, Pharmaceutical Companies, Laboratory Technicians, Chemical Suppliers, Food Safety Inspectors.
Bromothymol Blue, Powder, >99%
Bromothymol Blue (also known as bromothymol sulfone phthalein, Bromthymol Blue, and BTB) is a chemical indicator for weak acids and bases. At a pH of 6.0 or lower, it appears yellow. It transitions in color between pH 6.0 and 7.6, becoming completely blue at pH 7.6.
Product Specifications
| Chemical Name | Bromothymol Blue |
| Synonyms | Bromothymol sulfone phthalein, BTB |
| Purity | >99% |
| Color Change Range | Yellow at pH ≤ 6.0, Blue at pH ≥ 7.6 |
| Chemical Formula | C27H27O5SBr2Na |
| Molecular Weight | 646.38 g/mol |
| CAS Number | 34722-90-2 |
Applications and Benefits:
- Used as a chemical indicator for weak acids and bases
- Facilitates pH measurement in the range of 6.0 to 7.6
- High purity powder for accurate scientific applications
- 1 gram prepares up to 10 liters (3 gallons) of indicator solution
Caution:
This high-purity product requires special procedures for solution preparation. For beginners, a ready-to-use solution (BTB10S) is recommended.
Slotted Masses, 2 Grams, Spare
Slotted Masses are an essential tool for any physics lab. These 2 gram masses are designed with a slotted shape, making them easy to use and stack on top of each other. This spare set of Slotted Masses is perfect for replacing any lost or damaged pieces. Whether you're conducting experiments or teaching students, Slotted Masses are a reliable and necessary component for accurate measurements and calculations.
Product Specifications:
| Product Name | Slotted Masses |
| Weight | 2 Grams |
| Type | Spare |
| Design | Slotted |
| Material | N/A |
| Size | N/A |
| Color | N/A |
Perfect for:
- Science teachers and educators
- Physics students and enthusiasts
- Laboratory technicians and researchers
- Engineering students and professionals
- Anyone interested in experimenting with mass and weight
Caution: Handle slotted masses with care to avoid injury or damage. Use appropriate safety equipment when handling.
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