Description

Lacmoid is a synthetic organic dye belonging to the triphenylmethane class, widely recognized for its use as a pH indicator and biological stain. Its primary value lies in its distinct color change properties, which are essential for precise endpoint detection in analytical chemistry and histology. This product is critical for quality control laboratories, research institutions, and manufacturers in the chemical, pharmaceutical, and educational sectors who require reliable and consistent indicator dyes for their processes.

Application

• pH Indicator: Used in titrations and analytical chemistry to visually determine the endpoint of acid-base reactions, typically changing color within a specific pH range.
• Biological Staining: Employed in histology and microscopy for staining tissues and cellular structures to enhance contrast and visibility under a microscope.
• Laboratory Reagent: Serves as a key component in the formulation of various chemical test kits and laboratory solutions for educational and research purposes.
• Quality Control Testing: Utilized in industrial QC labs for monitoring chemical processes and ensuring product consistency through visual analytical methods.
• Educational Demonstrations: A common tool in academic settings for teaching fundamental concepts of chemistry, such as pH, indicators, and colorimetry.

Basic Information

Product Name	Lacmoid
CAS No.	33869-21-5
Molecular Formula	C25H30N3O3+
Molecular Weight	420.53 g/mol
Synonyms	Resorcin Blue; Lacmoid Indicator; Lacmoide; Azolitmin (commercial variant); C.I. 51180; Orcein Substitute; p-Hydroxybenzeneresonol-phthalein; 4-[Bis(4-hydroxy-3-methylphenyl)methylene]-2-methylcyclohexa-2,5-dien-1-one
EINECS	Contact for details

Quality Control

Our Lacmoid is produced under a strict quality management system to ensure batch-to-batch consistency and reliability for critical applications. Each lot undergoes comprehensive testing, including identification, purity assay, and performance verification as a pH indicator. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to support your quality assurance protocols.

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 and sources of ignition.

Specification

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

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