25390-17-4 Usage
General Description
S-(carboxymethyl)-DL-cysteine is a derivative of the amino acid cysteine and is commonly used as a mucolytic agent to help loosen and thin mucus in the airways, making it easier to cough up. It works by breaking down the disulfide bonds in mucus, reducing its viscosity. S-(carboxymethyl)-DL-cysteine has been used in the treatment of various respiratory conditions, such as chronic bronchitis and chronic obstructive pulmonary disease (COPD). It is often administered orally or inhaled as an aerosol and has been shown to be effective in improving symptoms and reducing mucus production in patients with these conditions.
Check Digit Verification of cas no
The CAS Registry Mumber 25390-17-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,5,3,9 and 0 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 25390-17:
(7*2)+(6*5)+(5*3)+(4*9)+(3*0)+(2*1)+(1*7)=104
104 % 10 = 4
So 25390-17-4 is a valid CAS Registry Number.
InChI:InChI=1/C5H9NO4S/c6-3(5(9)10)1-11-2-4(7)8/h3H,1-2,6H2,(H,7,8)(H,9,10)
25390-17-4Relevant articles and documents
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Ozawa
, p. 920 (1963)
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Optical Resolution of Racemic S-(Carboxymethyl)cysteine
Kleemann, Axel,Martens, Juergen
, p. 1995 - 1998 (2007/10/02)
Racemic S-(carboxymethyl)cysteine obtained from racemic cysteine is resolved via its ammonium salt (R,S)-3 by preferential crystallization procedure.Furthermore, (R,S)-2 forms with optically active amines separable, diastereomeric salts.Thus, (1R,2S)-2-amino-1-phenyl-1-propanol (4) affords optically pure (R)-S-(carboxymethyl)cysteine in 93 percent yield.The resolution of (R,S)-2 is also possible with (R)-1-phenylethylamine (5).
