7784-31-8

Name Aluminium sulfate octadecahydrate
CAS 7784-31-8
EINECS(EC#) 233-135-0
Molecular Formula Al2H36O30S3
MDL Number MFCD00149136
Molecular Weight 666.43
MOL File 7784-31-8.mol
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Chemical Properties

Appearance white crystalline powder and chunks
Melting point  86 °C
bulk density 820kg/m3
density  1,69 g/cm3
storage temp.  Sealed in dry,Room Temperature
solubility  364g/l
form  Powder/Solid
color  White
Specific Gravity 1.69
PH 2.5-4.0 (20g/l, H2O, 20℃)
PH Range 3 - 4
Water Solubility  Soluble
Sensitive  moisture sensitive
InChI InChI=1S/2Al.3H2O4S.18H2O/c;;3*1-5(2,3)4;;;;;;;;;;;;;;;;;;/h;;3*(H2,1,2,3,4);18*1H2/q2*+3;;;;;;;;;;;;;;;;;;;;;/p-6
InChIKey AMVQGJHFDJVOOB-UHFFFAOYSA-H
SMILES S([O-])([O-])(=O)=O.S([O-])([O-])(=O)=O.S([O-])([O-])(=O)=O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.[Al+3].[Al+3]
Uses
Alum is a preservative, the inclusive term for several inum-type compounds such as inum sulfate and inum potassium sulfate. It is used with edta to prevent discoloration of potatoes and to maintain the firmness of shrimp packs. It is also used in pickles and pickle relish.
CAS DataBase Reference 7784-31-8(CAS DataBase Reference)
EPA Substance Registry System 7784-31-8(EPA Substance)
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Safety Data

Symbol(GHS)  Corrosion (GHS05)
GHS05
Signal word  Danger
Hazard statements  H290-H318
Precautionary statements  P280-P305+P351+P338+P310
Hazard Codes  N-Xn,Xi
Risk Statements 
R51/53:Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment .
R41:Risk of serious damage to eyes.
R36/37/38:Irritating to eyes, respiratory system and skin .
R22:Harmful if swallowed.
Safety Statements 
S61:Avoid release to the environment. Refer to special instructions safety data sheet .
S37/39:Wear suitable gloves and eye/face protection .
S29:Do not empty into drains .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S39:Wear eye/face protection .
RIDADR  UN3260 - class 8 - PG 3 - RQ - Corrosive solid, acidic, inorganic, n.o.s., HI: all
WGK Germany  1
RTECS  WS5697000
HS Code  28332200
Storage Class 8B - Non-combustible corrosive hazardous materials
Hazard Classifications Eye Dam. 1
Met. Corr. 1
Skin Corr. 1A
Toxicity
LD50 orally in Rabbit: > 5000 mg/kg

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