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Online Edition: "Specifications for Flavourings"

Flavouring 1,9-Nonanedithiol
Synonym(s) Nonamethylene dimercaptan;1,9-Dimercaptononane
Latest JECFA evaluation 2002 (Session 59)
Status of specification Full
Chemical name 1,9-Nonanedithiol
JECFA number 542
CAS number 3489-28-9
FEMA number 3513
COE number 11558
FLAVIS number
Molecular weight 192.38
Chemical formula C9H20S2
Physical form/odour
Solubility insoluble in water; miscible in oils
Solubility in ethanol
Boiling point (°C) 284°
Assay min % 95% +2.1% 1,2-dithiacycloundecane (equil. mix)
Acid value max
Refractive index 1.4999-1.5099
Specific gravity 0.952-0.957
Other requirements
ID Test NMR, IR
Spectrum