7772-99-8 Usage
Description
Stannous Chloride, also known as Tin (II) Chloride, is an inorganic compound with the chemical formula SnCl2. It exists as white or colorless crystals and is highly soluble in water. Stannous Chloride is a strong reducing agent and readily reacts with oxygen, making it an effective antioxidant and preservative.
Uses
Used in Chemical Synthesis:
Stannous Chloride is used as a reagent for the synthesis of tin(IV) octaethylcorroles, which are new compounds that exhibit reversible oxidation only at the conjugated ring system, not at the metal center.
Used in Industrial Processes:
Stannous Chloride is used as a strong reducing agent in various industrial processes, such as manufacturing dyes, phosphors, and polymers. It is a major ingredient in acid tin plating baths and serves as a mordant in dyeing, an additive to lubricating oil to prevent sludging, a stabilizer for perfume in soaps, and a soldering flux.
Used in Antioxidant and Preservative Applications:
Stannous Chloride is used as an antioxidant and preservative in the food and beverage industry. It helps in color retention in asparagus at less than 20 ppm and is also used in carbonated drinks to prevent discoloration and undesirable odors.
Used in Laboratory Research:
Stannous Chloride is a common laboratory reagent and is used as a catalyst in many organic reactions. It is also used for preparing a number of tin(II) salts and as a sensitizing agent for glass, paper, and plastics.
Air & Water Reactions
Water soluble.
Reactivity Profile
STANNOUS CHLORIDE is a powerful reducing agent. Can react violently with oxidizing agents. Undergoes flaming reaction with bromine trifluoride [Mellor 2 Supp. 1:164 1956]. Catalyzes the exothermic rearrangement and polymerization of ethylene oxide [J. Soc. Chem. Ind. 68:179 1949]. Mixtures with calcium carbide can be ignited with a match, and the reaction proceeds with incandescence [Mellor 7:430 1946-47]. Reacts with hydrazine hydrate to give stannous dihydrazine chloride which decomposes explosively when heated [Mellor 7:430 1946-47]. Undergoes a strongly exothermic reaction with aqueous solutions of hydrogen peroxide having concentration exceeding 3%) [Chem. & Ind., 1949, 657].
Hazard
Irritant to skin, use in foods restricted to
0.0015%, as tin.
Health Hazard
TOXIC; inhalation, ingestion or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
Fire Hazard
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.
Safety Profile
Poison by ingestion,
intraperitoneal, intravenous, and
subcutaneous routes. Experimental
reproductive effects. Human mutation data
reported. Potentially explosive reaction with
metal nitrates. Violent reactions with
hydrogen peroxide, ethylene oxide,
hydrazine hydrate, nitrates, K, Na. Ignition
on contact with bromine trifluoride. A
vigorous reaction with calcium acetylide is
initiated by flame. When heated to
decomposition it emits toxic fumes of Cl-.
See also TIN COMPOUNDS.
Purification Methods
Analytical reagent grade stannous chloride dihydrate is dehydrated by adding it slowly to vigorously stirred, redistilled acetic anhydride (120g salt per 100g of anhydride) in a fume cupboard. After ca an hour, the anhydrous SnCl2 is filtered on to a sintered-glass or Büchner funnel, washed free from acetic acid with dry Et2O (2 x 30mL), and dried under vacuum. It is stored in a sealed container. [Stephen J Chem Soc 2786 1930, Williams Org Synth Coll Vol III 627 1955.]
Check Digit Verification of cas no
The CAS Registry Mumber 7772-99-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,7,7 and 2 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 7772-99:
(6*7)+(5*7)+(4*7)+(3*2)+(2*9)+(1*9)=138
138 % 10 = 8
So 7772-99-8 is a valid CAS Registry Number.
InChI:InChI=1/2ClH.Sn/h2*1H;/q;;+4/p-2/rCl2Sn/c1-3-2/q+2
7772-99-8Relevant articles and documents
Process for the production of monoalkyltin trihalides
-
, (2008/06/13)
The present invention is directed to a process for the production of monoalkyltin trihalides of the formula RSnX3, wherein R="alkyl or cycloalkyl and" X = Cl, Br or I, involving a redistribution reaction between tetraorganotins, triorganotin halides or diorganotin halides and tin tetrahalides, said process comprising contacting tetra- (R4Sn), tri- (R3SnX) or diorganotin halides (R2SnX2) with SnX4 to afford said monoorganotin trihalides in the presence of at least one transition metal complex, said complex comprising at least one transition metal, M, selected from Group VIII of the periodic Table of elements, at least one monodentate ligand or bidentate ligand, L, L' or L", and optionally one or more anions, X, of an organic or inorganic acid, as a catalyst or catalyst precursor.
Process for the preparation of halogenated 2,2-bis(trifluoromethyl)-1,3-dioxolanes
-
, (2008/06/13)
A process for the production of a halogenated 2,2-bis(trihaloalkyl)-1,3-dioxolane of the formula STR1 wherein Rf is perhaloalkyl comprising a 2,2-bis(trihaloalkyl)-1,3-dioxolane in the presence of at least one of La, Ni, Sn, Zn, Fe, Co or Cu is disclosed. A process for the production of a halogenated 2,2-bis(trihaloalkyl)-1,3-dioxolane of the formula STR2 wherein X is Cl and each Y is independently Cl or F and wherein at least one Y is F, comprising fluorinating a halogenated 2,2-bis(trifluoromethyl)-4,4,5,5-tetrachloro-1,3-dioxolane in the presence of a catalyst which is preferably Cr2 O3 is disclosed. A process for the production of a 2,2-bis(trihaloalkyl)-1,3-dioxole of the formula STR3 comprising dehalogenating substantially only a corresponding trans-2,2-bis(perhaloalkyl)-4,5-difluoro-4,5-dichloro-1,3-dioxolane is disclosed.
Diazo pigments
-
, (2008/06/13)
A diazo pigment dye having the formula STR1 in which R1 represents a hydrogen, chlorine or bromine atom or a nitro group, and R2 and R3 a hydrogen or chlorine atom or a methyl or methoxy group. A new coupling component for preparing the pigment is also disclosed. The dye possesses good tinctorial and advantageous environmental properties. Methods for preparing the dye are disclosed.
