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89360

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Thymolphthalein

ACS reagent, indicator (pH 8.8-10.5)

Synonyme(s) :

5′,5′′-Diisopropyl-2′,2′′-dimethylphenolphthalein

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About This Item

Formule empirique (notation de Hill):
C28H30O4
Numéro CAS:
125-20-2
Poids moléculaire :
430.54
Beilstein:
359413
Numéro CE :
204-729-7
Numéro MDL:
MFCD00005909
Code UNSPSC :
12000000
ID de substance PubChem :
329769727
Nomenclature NACRES :
NA.21
Le tarif et la disponibilité ne sont pas disponibles actuellement.

Qualité

ACS reagent
indicator (pH 8.8-10.5)

Niveau de qualité

200

Forme

solid

Technique(s)

UV/Vis spectroscopy: suitable
titration: suitable

Résidus de calcination

≤1%

Pf

248-254 °C
251-253 °C (lit.)

Chaîne SMILES 

CC(C)c1cc(c(C)cc1O)C2(OC(=O)c3ccccc23)c4cc(C(C)C)c(O)cc4C

InChI

1S/C28H30O4/c1-15(2)20-13-23(17(5)11-25(20)29)28(22-10-8-7-9-19(22)27(31)32-28)24-14-21(16(3)4)26(30)12-18(24)6/h7-16,29-30H,1-6H3

Clé InChI

LDKDGDIWEUUXSH-UHFFFAOYSA-N

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Catégories apparentées

Description générale

Thymolphthalien is an acid-base indicator which is colourless in acidic form and deep blue in basic form. Acidic form retains hydrogen on each hydroxyl group. It is suitable in preparing disappearing ink.[1]

Application

Thymolphthalein was suitable as indicator during titration of hyamine hydroxide.[2]

Code de la classe de stockage

11 - Combustible Solids

Classe de danger pour l'eau (WGK)

WGK 3

Point d'éclair (°F)

Not applicable

Point d'éclair (°C)

Not applicable

Équipement de protection individuelle

Eyeshields, Gloves, type N95 (US)

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Certificats d'analyse (COA)

Lot/Batch Number
BCCG9997
BCCH9312
BCCD9225
BCCB9528
BCBW2522

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Kerry K. Karukstis, Gerald R. Van Hecke
Chemistry Connections: The Chemical Basis of Everyday Phenomena, 74-74 (2003)
M J Bruno et al.
Clinical chemistry, 41(4), 599-604 (1995-04-01)
Two noninvasive tests for assessing pancreatic exocrine function, the cholesteryl-[14C]octanoate breath test and the HPLCN-benzoyl-tyrosyl-p-aminobenzoic acid/p-aminosalicylic acid (NBT-PABA/PAS) test, were simultaneously performed in nine patients with pancreatic exocrine insufficiency due to chronic pancreatitis and in nine healthy volunteers. 14CO2 output
Ali Babaei et al.
Analytical sciences : the international journal of the Japan Society for Analytical Chemistry, 22(7), 955-959 (2006-07-14)
A novel, sensitive and selective adsorptive stripping procedure for simultaneous determination of copper, bismuth and lead is presented. The method is based on the adsorptive accumulation of thymolphthalexone (TPN) complexes of these elements onto a hanging mercury drop electrode, followed
M N Hochmeister et al.
Journal of forensic sciences, 36(3), 656-661 (1991-05-01)
Some of the commonly used presumptive test reagents for identification of blood and semen could potentially affect the recovery of intact high-molecular-weight deoxyribonucleic acid (DNA) from evidentiary samples. Thus, the capability of performing restriction fragment length polymorphism (RFLP) analysis on
Y Tsuda et al.
The Japanese journal of antibiotics, 46(1), 1-7 (1993-01-01)
We presented a new colorimetric bioassay of aminoglycoside antibiotics, which were represented by netilmicin (NTL) in this study, based on the discoloration of thymolphthalein (TP) in paper (indicator-disc) by carbon dioxide produced by Bacillus subtilis. To evaluate the amount of
Afficher tous les articles scientifiques apparentés

Questions

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  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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