Bromothymol Blue sodium salt 34722-90-2

Bromothymol blue sodium salt is a pH indicator used to determine weak acids and bases. It is yellow when acidic and blue when alkaline. Storage method: Avoid light.

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Model:
34722-90-2
Brand:
futurechemical
Code:
34722-90-2

Product Description

BTB Basic information
Product Name:	BTB
CAS:	34722-90-2
MF:	C27H29Br2NaO5S
MW:	648.38
EINECS:	252-169-7
Mol File:	34722-90-2.mol
BTB Chemical Properties
Melting point	200-202°C
density	0.99
storage temp.	room temp
solubility	Solubility Soluble in water, ethanol
form	Powder
pka	7.0, 7.1(at 25℃)
color	Orange-brown to dark green
Odor	Characteristic odour
PH	6.0-7.6, yellow to blue
PH Range	Yellow (6.0) to blue (7.6)
Water Solubility	SOLUBLE
λmax	615nm, 392nm
ε(extinction coefficient)	≥35000 at 614-618nm in 0.1 M NaOH at 0.005g/L
BRN	6887926
Stability:	Stable. Incompatible with strong oxidizing agents.
Major Application	Lithium battery, textiles, antagonists
CAS DataBase Reference	34722-90-2(CAS DataBase Reference)
EPA Substance Registry System	Phenol, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis[2-bromo-3-methyl-6-(1-methylethyl)-, monosodium salt (34722-90-2)

Bromothymol Blue sodium salt C27H29Br2NaO5S 34722-90-2

Quality Assurance

Full-Process Quality Control: From incoming raw material inspection to in-process monitoring and final outgoing checks, every batch is inspected at each production stage against strict acceptance standards.
Third-Party Certified & Tested: Our quality management system is certified to ISO 9001, and products are regularly tested by accredited laboratories (e.g. SGS, TÜV). Test reports are available on request.
100% Batch Traceability: Each batch carries a unique lot number that links raw material records, production parameters, and test results, enabling complete traceability from factory to final delivery.
Pre-Shipment Inspection: Every order passes a final pre-shipment inspection, with inspection photos and reports shared before dispatch.

FAQ From Customers

Q1: What is the minimum order quantity?

A: There is no quantity limit for the first sample or trial order. Just tell us the actual quantity you need.
Q2: How can I confirm that the quality meets the requirements?

A: Provide your specifications, and our technical team will check them or customize them for you; we can provide TDS, MSDS, and COA, and accept third-party testing.
Q3: How do you ensure stable quality?

A: We manufacture under an ISO 9001 quality system, test every batch before release, and retain samples for 24 months for traceability.
Q4: Do you provide samples?

A: Yes — Free samples are available; freight is at buyer's expense for express delivery.