IUPAC Name: 3-Ethyl-2-[(1E,3E,5Z)-5-(3-ethyl-1,3-benzothiazol-2-ylidene)penta-1,3-dienyl]-1,3-benzothiazol-3-ium iodide
Synonyms of : Benzothiazolium, 3-ethyl-2-[(1E,3E,5Z)-5-(3-ethyl-2(3H)-benzothiazolylidene)-1,3-pentadienyl]-, iodide ; Benzothiazolium, 3-ethyl-2-[5- (3-ethyl-2-benzothiazolinylidene)-1,3-pentadienyl]-, iodide ; (2-Bis(3-ethylbenzothiazolyl))pentamethine cyanine iodide
CAS NO: 514-73-8
Molecular Formula :C₂₃H₂₃IN₂S₂
Molecular Weight :518.4766
Molecular Structure :
EINECS: 208-186-7
Melting point:249 °C (dec.)(lit.)
Storage temp:Poison room
Appearance: 3,3'-Diethylpentamethinethiacyanine iodide (CAS NO.514-73-8) is green, needle-like crystals.
 

 3,3'-Diethylpentamethinethiacyanine iodide (CAS NO.514-73-8) is used as a veterinary anthelmintic, as a sensitizer for photographic emulsions and as an insecticides. Not registered as a pesticide in the U.S.

EPA Extremely Hazardous Substances List. Reported in EPA TSCA Inventory.

Poison by ingestion, intraperitoneal, and intravenous routes. When heated to decomposition it emits very toxic fumes of I⁻, SO_x, and NO_x. See also IODIDES.
Hazard Codes T+
Risk Statements 28-36/37/38
R28:Very toxic if swallowed. 
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements 26-28-36/37-45
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S28:After contact with skin, wash immediately with plenty of soap-suds. 
S36/37:Wear suitable protective clothing and gloves. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
RIDADR UN 2811 6.1/PG 2
WGK Germany 3
RTECS DL7060000
F 8
HazardClass 6.1
PackingGroup II

1.Reactivity Profile: An amine, organosulfide. Organosulfides are incompatible with acids, diazo and azo compounds, halocarbons, isocyanates, aldehydes, alkali metals, nitrides, hydrides, and other strong reducing agents. Reactions with these materials generate heat and in many cases hydrogen gas. Many of these compounds may liberate hydrogen sulfide upon decomposition or reaction with an acid. Amines are chemical bases. They neutralize acids to form salts plus water. These acid-base reactions are exothermic. The amount of heat that is evolved per mole of amine in a neutralization is largely independent of the strength of the amine as a base. Amines may be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen is generated by amines in combination with strong reducing agents, such as hydrides.
2.Health Hazard :Highly toxic by mouth. (Non-Specific -- Pesticide, Solid, n.o.s.) Poisonous if swallowed, or if dust is inhaled.
3.Fire Hazard :When heated to decomposition, 3,3'-Diethylpentamethinethiacyanine iodide (CAS NO.514-73-8) emits toxic fumes of iodine, sulfur oxides, and nitrogen oxides.