Description

Litmus CAS NO 1393-92-6 is a natural pH indicator dye derived from lichens, primarily used to determine the acidity or alkalinity of aqueous solutions. Its core value lies in its distinct and reversible color change, providing a simple, reliable, and cost-effective method for qualitative pH testing across numerous industries. This product is essential for laboratories, educational institutions, and quality control departments in chemical, pharmaceutical, and environmental sectors requiring rapid on-site pH assessment.

Application

• Laboratory pH Testing: A fundamental tool in educational and research laboratories for demonstrating and identifying acidic or basic conditions in chemical reactions.
• Quality Control & Process Monitoring: Used in various industrial processes for quick checks of pH levels in water treatment, fermentation, and chemical synthesis stages.
• Microbiological Media Preparation: Employed as a pH indicator in certain culture media to visually confirm the production of acids or bases by microorganisms.
• Educational Kits and Demonstrations: A key component in school science kits for safe and visual acid-base experiments.
• Paper Strip Production: The raw material for manufacturing litmus paper, a ubiquitous and portable testing tool.
• Preliminary Environmental Analysis: Provides an initial, rapid assessment of the pH of water samples in field studies.

Basic Information

Product Name	Litmus
CAS No.	1393-92-6
Molecular Formula	Complex mixture (Natural dye)
Molecular Weight	N/A (Mixture)
Synonyms	Litmus; Lacmus; Turnsole; Lacca Musica; Lichen Blue; Orchil; Archil; C.I. Natural Blue 25; C.I. 1242; Orcein; Azolitmin (main colorant)
EINECS	215-739-6

Quality Control

Our Litmus is sourced and processed to ensure consistent performance as a pH indicator. While it is a natural product mixture, we implement rigorous quality checks for key parameters such as color transition range, solubility, and batch-to-batch consistency. A Certificate of Analysis (COA) detailing these characteristics is available for every batch to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at room temperature (15-25°C). Keep the container tightly sealed when not in use to prevent moisture absorption and contamination.

Specification

Item	Specification
Appearance	Blue to violet powder or pieces
Solubility (in Water)	Partially soluble, gives a blue color
pH Color Change (Approx.)	Red below pH 4.5; Blue above pH 8.3
Loss on Drying	Contact for details
Ash Content	Contact for details

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