PRODUCT CODE:

131167

Bromothymol Blue PA-ACS
pH indicator 6,0 yellow; 7,6 blue

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C₂₇H₂₈Br₂O₅S

M.= 624,40	CAS [76-59-5]	EINECS 200-971-2
NC 2932 99 85

SYNONYMS: 3’,3’’-Dibromothymolsulphonephtalein · BTB ·
PHYSICAL DATA: Creamy white crystalline powder · Solubility in water at 20 ° C 1 g/l. In alcohol 20 g/l · M. P.: 200-202 ºC dec · pK: 7,0 ·
APPLICATIONS: Analytical reagent: RFE · USP 25 · BP · Ph. Eur. IV · F.C.C. IV · pH indicator: " Reagent Chemicals" 8th Ed. , 197 , American Chemical Society , Washington DC. (1993) ·Adsortion indicator ·It has also been employed as a vital dye by McMaster and Parson (1938) ·As a stain for fungi in roots by Garret (1937) ·As an indicator in culture media ·
BIBLIOGRAPHY: Merck Index 12 , 1469 13 , 1430 · Conn’s IX , 324 · Beilstein 19 , 3 V , 461 · BRN: 373934 · ACS IX , 198 4 (30-10-2003) X , 214 ·

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HAZARDOUS: RTECS: SJ 7450000 ·

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SPECIFICATIONS:

Identity	IR p/t.
T.L.C	p/t.
MAXIMUM LIMIT OF IMPURITIES
pH transition interval:
yellow	6,0
blue	7,6
Transition interval according to ACS	p/t.
Insoluble matter in C2H5OH	p/t.
Loss on drying at 110°C	5 %
Residue on ignition (as SO4)	0,5 %
Cu	0,005 %
Fe	0,005 %
Ni	0,005 %
Pb	0,005 %