Description

Lacmoid is a synthetic organic dye belonging to the phthalein class, widely recognized for its use as a pH indicator and biological stain. Its precise chemical structure allows for distinct color changes, making it a valuable tool for analytical and research applications. This high-purity compound is essential for laboratories and manufacturers in the chemical, pharmaceutical, and life science sectors requiring reliable and consistent performance in their processes.

Application

• pH Indicator: Used in titrations and analytical chemistry to visually determine the endpoint of acid-base reactions.
• Biological Staining: Employed in microscopy and histology for staining cellular components and tissues in biological research.
• Chemical Reagent: Serves as a key component in the formulation of specialized chemical test kits and laboratory reagents.
• Educational Demonstrations: Utilized in academic settings to teach fundamental principles of chemistry, such as pH and colorimetry.
• Quality Control Testing: Applied in industrial QC labs for various colorimetric assays and purity checks.

Basic Information

Product Name	Lacmoid
CAS No.	87495-30-5
Molecular Formula	C20H14Br4O5
Molecular Weight	647.94 g/mol
Synonyms	Resorcinol Blue; Lacmoide; Tetrabromophenolphthalein Ethyl Ester; NSC 6178; 3',3'',5',5''-Tetrabromophenolphthalein Ethyl Ester; Lacmoid Indicator; Resazurin (historical/related context)
EINECS	Contact for details

Quality Control

Our Lacmoid is manufactured under a strict quality management system to ensure batch-to-batch consistency and high purity. Each lot is subjected to comprehensive analytical testing, including identification, assay, and impurity profiling. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee compliance with your specifications and industry standards.

Storage

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

Specification

Item	Specification
Appearance	Dark green to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
pH Transition Range	4.4 (yellow) to 6.2 (blue)
Solubility	Soluble in ethanol, alkali; slightly soluble in water

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