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Eriochrome Black T ACS Reagent 100 g – AFG Scientific

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ACS Reagent grade Eriochrome Black T used as an indicator in complexometric titrations, supplied in 100 g packaging.

  • ACS Reagent grade standard
  • CAS No: 1787-61-7
  • Molecular Formula: C20H12N3O7SNa
  • Molecular Weight: 461.4 g/mol
  • Appearance: Black crystalline powder
  • Room temperature storage

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Eriochrome Black T is a black crystalline powder of ACS Reagent quality used as a metal ion indicator in complexometric titrations performed with EDTA. It is the standard choice for analytical laboratories in titrimetric analysis of calcium, magnesium, and other metal ions, particularly in water hardness determination. Produced by AFG Scientific and supplied in 100 g packaging, this compound can be stored at room temperature. Also known as Mordant Black 11 and CI 14645, this reagent provides full traceability with its defined molecular weight and CAS number. Suitable for titration experiments in analytical laboratories, educational laboratories, and quality control applications.

Technical Specifications

Manufacturer AFG Scientific
CAS No 1787-61-7
Molecular Formula C20H12N3O7SNa
Molecular Weight 461.4 g/mol
Synonyms Mordant Black 11; CI 14645
Grade ACS Reagent
MDL No MFCD00003935
Appearance Black crystalline powder
Storage Temperature Room temperature
Package Size 100 g

Applications

  • Metal ion indicator in complexometric titrations
  • Water hardness (Ca/Mg) determination
  • Titrimetric analysis in educational and research laboratories

Frequently Asked Questions

What is Eriochrome Black T used for?
It is primarily used as an indicator in complexometric titrations with EDTA for the determination of metal ions such as calcium and magnesium.
What are the storage conditions?
Store at room temperature in a dry environment protected from light.
What does ACS Reagent grade mean?
It means the compound meets the purity and quality standards established by the American Chemical Society.