Description

Erio Green B [Indicator For Oxidimetry] is a high-purity chemical indicator specifically formulated for redox titrations. Its precise color change at the endpoint is critical for ensuring accurate and reliable volumetric analysis in demanding laboratory and industrial settings. This product is essential for quality control laboratories, chemical manufacturers, and research institutions requiring definitive results in oxidimetry applications.

Application

Erio Green B serves as a specialized visual endpoint indicator in various analytical procedures, primarily within redox titrations.

• Primary Use as a Redox Indicator: Employed in cerimetry and other oxidimetric titrations to signal the equivalence point with a sharp, distinct color change.
• Analytical Chemistry & Research: Used in university, industrial, and government laboratories for quantitative analysis of reducing agents or oxidants.
• Pharmaceutical Quality Control (QC): Applied in the assay of active pharmaceutical ingredients (APIs) and raw materials where redox reactions are part of the standard pharmacopoeial methods.
• Water & Environmental Analysis: Useful in procedures for determining chemical oxygen demand (COD) or the concentration of specific oxidizing/reducing pollutants.
• Industrial Process Control: Monitors chemical processes in real-time or offline where redox potential is a key parameter.
• Educational & Teaching Laboratories: Provides a clear visual demonstration of titration principles for students in chemistry courses.

Basic Information

Product Name	Erio Green B [Indicator For Oxidimetry]
CAS No.	1325-44-6
Molecular Formula	C20H10N2Na2O11S2
Molecular Weight	528.41 g/mol
Synonyms	Erioglaucine A; Acid Blue 9; C.I. 42090; FD&C Blue No. 1; Brilliant Blue FCF; E 133; Erioglaucine disodium salt; Blue FCF; Food Blue 2
EINECS	204-382-2

Quality Control

Our Erio Green B is manufactured under strict quality management systems to guarantee batch-to-batch consistency and performance reliability. Each lot undergoes comprehensive testing, including identification, assay, and impurity profile analysis, to meet exacting standards for analytical reagent use. A Certificate of Analysis (COA) detailing all test results is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark blue to blue-green powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0 %
Residue on Ignition (Sulfated Ash)	≤ 30.0 %
pH (1% Solution)	6.0 - 8.0
Color Change (Endpoint)	Distinct and sharp transition

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.