7784-24-9 Usage
Chemical Properties
Different sources of media describe the Chemical Properties of 7784-24-9 differently. You can refer to the following data:
1. white to colourless crystals
2. Aluminum is the most commonly available element in homes and workplaces. Aluminum
is readily available for human ingestion through the use of food additives, antacids,
buffered aspirin, astringents, nasal sprays, and antiperspirants; from drinking water;
from automobile exhaust and tobacco smoke; and from using aluminum foil, aluminum
cookware, cans, ceramics, and fi reworks. Workers who are at risk for toxicity are those
in refi neries, foundries and also welders and grinders.
Uses
Different sources of media describe the Uses of 7784-24-9 differently. You can refer to the following data:
1. potassium alum (alum) is a cosmetic astringent.
2. Aluminium potassium sulfate dodecahydrate is a white crystal that is soluble in water. It is made by roasting alunite in a furnace and then harvesting the product by crystallization. Aluminium potassium sulfate dodecahydrate was used to harden gelatin emulsions by introduction, by bathing the exposed plates prior to development, or by use in the fixing bath. Mixed with citric or other acids, it was also used as a clearing bath to remove developer stains in negatives.
3. Buffer; floccculating reagent.
Definition
Different sources of media describe the Definition of 7784-24-9 differently. You can refer to the following data:
1. ChEBI: A hydrate resulting from the the formal combination of anhydrous potassium aluminium sulfate with 12 mol eq. of water.
2. A group of double salts withthe formula A2SO4.B2(SO4)3.24H2O,where A is a monovalent metal and Ba trivalent metal. The original examplecontains potassium and aluminium(called potash alum orsimply alum); its formula is oftenwritten AlK(SO4)2.12H2O (aluminiumpotassium sulphate-12-water). Ammoniumalum is AlNH4(SO4)2.12H2O,chrome alum is KCr(SO4)2.12H2O, etc.The alums are isomorphous and canbe made by dissolving equivalentamounts of the two salts in waterand recrystallizing.
General Description
Aluminum potassium sulfate dodecahydrate is an inorganic sulfate salt of aluminum and potassium. Linear growth rates of (100), (111) and (110) faces of its crystals have been investigated.
Health Hazard
Prolonged periods of exposure to aluminum and dust cause symptoms of toxicity that
include, but are not limited to, coughing, wheezing, shortness of breath, memory loss,
learning diffi culty, loss of coordination, disorientation, mental confusion, colic, heartburn,
fl atulence, and headaches. Chronic exposures to alumina dust cause irritation to the eyes,
Purification Methods
Crystallise it from weak aqueous H2SO4 (ca 0.5mL/g). Its solubility (%) in H2O is 5.7 (0o), 12.0 (20o) and 136.9 (100o).
Precautions
Aminocarb decomposes on heating and produces toxic fumes, irritating fumes, and oxides
of nitrogen. During handling of aminocarb workers should wear protective clothing,
gloves, face shield, breathing protection and avoid open flames.
Check Digit Verification of cas no
The CAS Registry Mumber 7784-24-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,7,8 and 4 respectively; the second part has 2 digits, 2 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 7784-24:
(6*7)+(5*7)+(4*8)+(3*4)+(2*2)+(1*4)=129
129 % 10 = 9
So 7784-24-9 is a valid CAS Registry Number.
InChI:InChI=1/Al.K.H2O4S.12H2O/c;;1-5(2,3)4;;;;;;;;;;;;/h;;(H2,1,2,3,4);12*1H2/q+3;+1;;;;;;;;;;;;;/p-2