Ferric Alum Indicator
Ferric Alum Indicator is Chemical indicators used as oxidation reduction indicators.
Ferric Alum Indicator is Chemical indicators used as oxidation reduction indicators.
It is used in medicine, chemical analysis and metallurgy.
Ferrous Ammonium Sulfate Hexahydrate ( Crystalline). Also know as Ammonium iron(II) sulfate, or Mohr's salt, is the inorganic compound with the formula (NH₄)₂Fe(SO₄)₂·6H₂O.
| Physical State | Crystals |
| Color | Pale green |
| Odor | Odorless |
| pH | 3-5 (5% aqueous solution) |
| Vapor Pressure | No information found |
| Vapor Density | No information found |
| Evaporation Rate | Evaporation Rate |
| Viscosity | No information found |
| Boiling Point | Not available |
| Freezing/Melting Point | 100°C (decomposes) |
| Decomposition Temperature | 100-110°C |
| Solubility in water | 269 g/l @ 20°C |
| Specific Gravity/Density | 1.865 |
| Molecular Formula | FeSO4(NH4)2so46H2O |
| Molecular Weight | 392.14 |
- Manufacturer Part Number: R3050000-120A
- Grade: ACS grade
- CAS#: 7732-18-5,7697-37-2,7783-83-7
- Size: 120 mL Natural Poly bottle
- Boiling Point: Approximately 101°C
- Appearance: Amber liquid
- Physical State: liquid
- Shelf Life (months): 24
- Suitability for Use: White precipitate (Excess Silver ions) - Reddish-Brown Color (Excess Thiocyanate ions). White precipitate (Excess Silver ions) - Reddish-Brown Color (Excess Thiocyanate ions)
Ferrous Ammonium Sulfate solutions are used as reductometric standards in titrations involving Ceric, Dichromate and Permanganate ions, as well as other oxidizers. Since Ferrous ion is easily oxidized by air to Ferric ion, Ferrous Ammonium Sulfate solutions are not as stable as other reductometric standards such as Arsenic Trioxide and Sodium Oxalate solutions, but they do not have the toxicity or environmental problems of the others. Because of this inherent instability, it is recommended that Ferrous Ammonium Sulfate solutions be restandardized periodically when extreme accuracy is required.
Freshly standardized Ferrous Ammonium Sulfate solutions are used in the determination of Chlorine in drinking water, among other applications. Typical reactions involving Ferrous ions are:
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Dust mask; goggles or face shield; protective gloves (USCG, 1999)
First Aid : INGESTION: give large amount of water; induce vomiting if large amounts have been swallowed.
EYES or SKIN: flush with water. (USCG, 1999)
