Table VIII.

FT-IR Spectra for Dry Physical Mixture (Powder) and Complex of Propranolol HCl and NaCMC

Propranolol HCl/NaCMC (powder)	Propranolol HCl/NaCMC (complex)	Comments
	689.59	New peak
	706.98	New peak
736.68	733.56
769.46	770.19
796.76	793.87
900.25	900.09
	990.30	New peak
1,029.92	1,026.53
	1,038.15	New peak
1,105.06	1,101.25	Band width change
1,141.66
1,156.11		Change in S = O symmetric stretching
1,240.46	1,240.17
1,266.67	1,268.03	Band width change, C–O Stretch
1,321.89	1,314.39	Band width change, C–O Stretch
1,400.15	1,392.10	Band width change
1,452.14	1,456.80	Band width change
	1,488.81	New peak: –C = C– and –C = O vibration/stretch and –NH deformation
1,509.64	1,507.65
1,521.15	1,521.14
1,580.14	1,580.13
1,845.13	1,829.99	Carbonyl COOH stretching, C = O stretch; salt formation
1,918.79	1,918.53
	1,923.96	New peak
1,943.99	1,943.59
1,968.54	1,969.12
	2,134.36	New peak
2,177.05	2,164.05	Stretch
	2,347.08	New peak
	2,732.59	New peak
	2,748.55	New peak
	2,850.38	New peak, –C–H
	3,249.04	New peak
3,271.55
	3,330.58	New peak, –NH and –OH stretching