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Eriochrome Black T is a dark purple-brown or black azo dye commonly used as a complexometric indicator in analytical chemistry, especially to determine water hardness via EDTA titration.
Chemical Properties
Molecular formula: C₆₀H₁₂N₃O₇SNa
Molar mass: 461.38 g/mol
Appears as a dark red-brown or black powder; odorless.
Soluble in water (5 g/100 ml at 20°C) but nearly insoluble in most organic solvents including ethanol.
pKa values: ~6.2 and 11.55 (for acid dissociation).
Indicator Function
In EDTA titration, Eriochrome Black T binds metal ions such as Ca²⁺ and Mg²⁺, turning red when complexed.
When all metal ions are chelated by EDTA, the indicator reverts to its unbound blue form, marking the titration endpoint.
It’s also used to detect rare earth metals and can serve in test paper preparation for calcium detection.
Safety and Storage
Irritant but not considered highly toxic or carcinogenic; ingestion may cause diarrhea.
Store in closed amber bottles, away from light and corrosive vapors to preserve stability.
Eriochrome Black T is fundamental in water quality assessment and general complexometric analysis due to its distinct color change and reliable sensitivity to metal ions.
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Ferrous borate extra pure is a high-quality iron(II) borate compound (commonly referred to as iron(II) borate or ferrous borate), used predominantly in laboratory and industrial settings for applications that demand high purity standards. It typically appears as a fine, air-sensitive solid and is valued for its chemical stability under controlled conditions. The compound features a high degree of purity, making it especially suitable for analytical work, advanced research, and select industrial processes.
Product Description for Website
Ferrous borate extra pure (Iron(II) borate) is a premium-grade inorganic salt prepared to strict purity standards, ensuring low levels of contaminants and accurate stoichiometry for scientific and technical applications. The product is carefully processed and packaged to maintain its chemical integrity and support reliable results in laboratory analysis and synthesis.
Synonyms: Iron(II) borate, Ferrous borate
Chemical Formula: Fe(BO2)2 (hydrated forms and other stoichiometries possible)
Appearance: Pale solid, may be air-sensitive
Grade: Extra pure (analytical/research grade)
Applications: Used in specialized laboratory analyses, catalyst systems, advanced inorganic synthesis, and as a starting material in certain industrial applications where high purity is critical.
Key Features
High purity and controlled chemical analysis for reliable, reproducible results
Packaged with minimal contamination risk and maximum shelf-life
Suitable for use in chemical research, formulation, and manufacturing at the analytical level
Safety & Handling
Ferrous borate is generally stable under typical laboratory conditions but should be handled with care as it may be sensitive to atmospheric moisture and air. Use standard personal protective equipment and store in a tightly sealed container in a cool, dry environment.
This concise description is suitable for use as a base product summary or catalog entry for e-commerce or laboratory supply websites, ensuring clarity for research and procurement professionals.
Ferrous borate extra pure is a high-quality iron(II) borate compound (commonly referred to as iron(II) borate or ferrous borate), used predominantly in laboratory and industrial settings for applications that demand high purity standards. It typically appears as a fine, air-sensitive solid and is valued for its chemical stability under controlled conditions. The compound features a high degree of purity, making it especially suitable for analytical work, advanced research, and select industrial processes.
Product Description for Website
Ferrous borate extra pure (Iron(II) borate) is a premium-grade inorganic salt prepared to strict purity standards, ensuring low levels of contaminants and accurate stoichiometry for scientific and technical applications. The product is carefully processed and packaged to maintain its chemical integrity and support reliable results in laboratory analysis and synthesis.
Synonyms: Iron(II) borate, Ferrous borate
Chemical Formula: Fe(BO2)2 (hydrated forms and other stoichiometries possible)
Appearance: Pale solid, may be air-sensitive
Grade: Extra pure (analytical/research grade)
Applications: Used in specialized laboratory analyses, catalyst systems, advanced inorganic synthesis, and as a starting material in certain industrial applications where high purity is critical.
Key Features
High purity and controlled chemical analysis for reliable, reproducible results
Packaged with minimal contamination risk and maximum shelf-life
Suitable for use in chemical research, formulation, and manufacturing at the analytical level
Safety & Handling
Ferrous borate is generally stable under typical laboratory conditions but should be handled with care as it may be sensitive to atmospheric moisture and air. Use standard personal protective equipment and store in a tightly sealed container in a cool, dry environment.
This concise description is suitable for use as a base product summary or catalog entry for e-commerce or laboratory supply websites, ensuring clarity for research and procurement professionals.