Description
Bromocresol green is an ACS-grade pH indicator dye with CAS number 76-60-8, EG number 200-972-8 and empirical formula C₂₁H₁₄Br₄O₅S. The molar mass is 698,04 g/mol, supporting precise preparation of indicator solutions for titrimetry and pH visualisation. As a classic sulfonephthalein indicator, bromocresol green is used to mark acid–base transitions in aqueous systems, in buffered media and in educational demonstrations of colour-change endpoints. The ACS specification from manufacturer Carl ROTH provides a defined quality level for laboratories that standardise indicator stocks against established protocols. Clear molecular identity—formula, molar mass, CAS and EG numbers—facilitates documentation in SOPs, reagent logs and purchasing records. The glass primary packaging protects the solid dye during storage and handling prior to dissolution.
This article is part of Indicators & indicator solutions, in Analytical standards & reference materials.
Key features
- Appearance: yellowish to pink-brown powder
- Appearance of solution: complies
- pH-transition range: 3.8 (yellow)-5.4 (blue)
- Loss on drying (110 °C): ≤3 %
- CAS number: 76-60-8
- Pack sizes: 1 g, 5 g, 10 g, 25 g
- EG nr.: 200-972-8
- Empirical formula: C₂₁H₁₄Br₄O₅S
- Molar mass: 698,04 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
Recently viewed
You may also like
Browse related categories
Category
Analytical standards & reference materials
Sub-category
Indicators & indicator solutions
Catalogue
Brand
Questions about Bromocresol green, ACS, 1 g, glass
What is this article?
Bromocresol green, ACS, 1 g, glass is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Indicators & indicator solutions, inside Analytical standards & reference materials, in Lab chemicals.
An indicator solution changes colour at a stated point, usually a pH interval or a redox potential, so a titration endpoint can be seen. The solvent and the concentration decide how sharp the change is. A solid indicator dye and a ready solution are different articles.
A reference material is the article against which another result is compared. Its value is stated, and the uncertainty of that value is part of the product. An ICP or ion standard is a solution of known concentration. A volumetric standard is for titration. A chromatography standard is the peak you match. The grade names, including pharmacopoeia and ASTM, say which impurities were limited. Identity is checked on PubChem. Names follow IUPAC. Medicinal grades follow the European Pharmacopoeia and USP.
Which category should I open next?
The category is Analytical standards & reference materials. The sub-category is Indicators & indicator solutions. The catalogue is Lab chemicals.
Shelves beside this one are ICP, AAS & ion standards, Chromatography standards (GC, HPLC, pesticides), Reference substances & reagents (other), Volumetric standard solutions (titration), Reagents for analysis (Ph. Eur., ASTM, DIN) and Spectroscopy & physical property standards.
What should I check before I order?
The technical information on this page is the manufacturer's sheet. Read that, not a rewritten specification.
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.