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Citric Acid
Product #8110
Citric Acid is often incorporated into acid formulations. Its function is to prevent the precipitation of gelatinous ferric hydroxide as the acid spends.
As a sequestering agent, citric acid can hold as much as 3000 mg/L of ferric iron in spent acid solutions for more than 4 hours at temperatures above 80°C.
Citric Acid is one of the most economical iron sequestering agents available. However, it should not be used at concentrations greater than 2 kg/m³ as it can precipitate calcium nitrate if there is insufficient iron for it to sequester.
As a cementing additive, Citric Acid can be used as a retarder as well as cement dispersant. It is normally used at between 0.1% and 0.3% by weight of cement. Citric Acid can also be used in a wide range of applications where the pH of aqueous fluids has to be lowered.
Specifications
Citric Acid | 99.5% min | Water | 1.0% max |
Sulphated Ash | 0.1% max | Calcium | 200 mg/L max |
Chloride | 50 mg/L max | Iron | 50 mg/L max |
Oxalate | 350 mg/L max | Sulphate | 150 mg/L max |
Arsenic | 3 mg/L max | Heavy Metals | 10 mg/L max |
Mixing & Handling
Although Citric Acid is of low hazard and toxicity, excess exposure to dust should be avoided to prevent irritation to the eyes, skin and respiratory tract. As with all organic material, caution is advised when storing or handling near strong oxidizing agents, alkali metals or strong bases.
Physical Properties
Appearance: Colorless and odorless grains
Specific Gravity: 1.65
Molecular Weight: 192.14
Molecular Formula: HOC(CH2CO 2H) 2CO2H
Melting Point: 153°C
Chemical Properties
Type: Anhydrous crystals
Solubility: 60% @ 20°C (162 gms/100mLs of H20)
pH 0.1 N solution: 2.2 approx.
Packaging & Controls
This product appears in:
- Alkalinity Controllers - Oil & Gas
- Specialty Additives
- General Chemicals - Geotechnical & Environmental
- General Chemicals - Geothermal
- General Chemicals - HDD
- General Chemicals - Mineral Exploration
- General Chemicals - Oil Sands Coring
- General Chemicals - Water Well
- General Chemicals - Tunneling
- General Chemicals - Jet Grouting
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