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2,2'-dimethylaminemethylenephenolphthalein, also known as 2,2'-dimethylaminomethylenephenolphthalein, is a synthetic organic compound that serves as a pH indicator. It is a derivative of phenolphthalein, with the addition of a dimethylamino group on the methylene bridge connecting the two phenolphthalein moieties. This modification enhances the color change properties, making it more sensitive to pH variations. The compound is colorless in acidic solutions and turns red in basic solutions, with a color change range typically between pH 8.2 and 10.0. It is used in various applications, including titration to determine the endpoint of a base titration against an acid, and in educational settings to demonstrate the concept of pH and acid-base reactions. The compound's chemical structure and properties make it a valuable tool in analytical chemistry and educational demonstrations.

1178-67-2

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1178-67-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1178-67-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,1,7 and 8 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1178-67:
(6*1)+(5*1)+(4*7)+(3*8)+(2*6)+(1*7)=82
82 % 10 = 2
So 1178-67-2 is a valid CAS Registry Number.

1178-67-2Downstream Products

1178-67-2Relevant academic research and scientific papers

Phenol quaternary ammonium derivatives: Charge and linker effect on their DNA photo-inducible cross-linking abilities

Song, Yang,Tian, Tian,Wang, Ping,He, Hanping,Liu, Wulue,Zhou, Xiang,Cao, Xiaoping,Zhang, Xiao-Lian,Zhou, Xin

, p. 3358 - 3366 (2008/09/16)

We report here that phenol derivatives with two and four quaternary ammoniums were synthesized and their abilities to bind and cross-link DNA were investigated. Thermal denaturizing studies indicated that derivatives possess similar DNA binding abilities and gel electrophoresis revealed that more charges (series B) and electronic donation substitute linkers (like -S-) dramatically increase the DNA cross-linking abilities. The Royal Society of Chemistry 2006.

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