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| CAS No.: | 68647-86-9 |
|---|---|
| Name: | GLASSY CARBON |
| Molecular Structure: | |
|
|
|
| Formula: | C |
| Molecular Weight: | 12.01 |
| Synonyms: | Coconut shell charcoal |
| EINECS: | 231-153-3 |
| Density: | ~1.7 g/mL at 25 °C(lit.) |
| Melting Point: | 3550 °C(lit.) |
| Boiling Point: | 4200°F |
| Flash Point: | >230 °F |
| Solubility: | insoluble in water |
| Appearance: | Odorless, black cylindrical solid |
| Hazard Symbols: |
 F
|
| Risk Codes: | 36/37 |
| Safety: | 26-36 |
| Transport Information: | UN 1325 4 |
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Chemistry
Product Name: Activated Carbon
Molecular Formula: C
Molecular Weight: 12.01
Synonyms of Activated Carbon (CAS NO.68647-86-9): Coconut shell char ; Coconut shell charcoal ; EINECS 271-974-4 ; Charcoal, coconut shell
CAS NO: 68647-86-9
Classification Code: TSCA UVCB
Melting point: 3550 °C
Boiling Point: 500-600 °C
Flash Point: >230 °F
Density: ~1.7 g/mL at 25 °C
Vapor pressure: <0.1 mm Hg ( 20 °C)
Form: red
Physically, activated carbon binds materials by Van der Waals force or London dispersion force.
Activated Carbon (CAS NO.68647-86-9) does not bind well to certain chemicals, including alcohols, glycols, ammonia, strong acids and bases, metals and most inorganics, such as lithium, sodium, iron, lead, arsenic, fluorine, and boric acid. Activated carbon does adsorb IODINE very well and in fact the IODINE number, mg/g, (ASTM D28 Standard Method test) is used as an indication of total surface area.
Uses
Activated Carbon (CAS NO.68647-86-9) is used in gas purification, GOLD purification, metal extraction, WATER purification, medicine, sewage treatment, air filters in gas masks and filter masks, filters in compressed air and many other applications. One major industrial application involves use of activated carbon in metal finishing field.
It is also used for the measurement of RADON concentration in air.
Activated Carbon is used to treat poisonings and overdoses following oral ingestion.
It is also used for bowel preparation by reducing intestinal gas content before abdominal radiography to visualize bile, pancreatic and renal stones.
Production
Activated Carbon (CAS NO.68647-86-9) is produced from carbonaceous source materials like nutshells, wood and coal. It can be produced by one of the following processes:
1. Chemical activation: Prior to carbonization, the raw material is impregnated with certain chemicals. The chemical is typically an acid, strong base, or a salt (phosphoric acid, potassium hydroxide, sodium hydroxide, zinc chloride, respectively). Then, the raw material is carbonized at lower temperatures (450-900 °C). It is believed that the carbonization / activation step proceeds simultaneously with the chemical activation. This technique can be problematic in some cases, because, for example, zinc trace residues may remain in the end product. However, chemical activation is preferred over physical activation owing to the lower temperatures and shorter time needed for activating material.
2. Physical reactivation: The precursor is developed into activated carbons using gases. This is generally done by using one or a combination of the following processes:
Carbonization: Material with carbon content is pyrolyzed at temperatures in the range 600-900 °C, in absence of air (usually in inert atmosphere with gases like argon or nitrogen)
Activation/Oxidation: Raw material or carbonised material is exposed to oxidizing atmospheres (carbon dioxide, oxygen, or steam) at temperatures above 250 °C, usually in the temperature range of 600-1200 °C.
Safety Profile
Hazard Codes of Activated Carbon (CAS NO.68647-86-9): 
F
Risk Statements: 36/37
R36/37: Irritating to eyes and respiratory system.
Safety Statements: 26-36
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36: Wear suitable protective clothing.
RIDADR: UN 1325 4.1/PG 3
WGK Germany: 3
RTECS: FF5250100
HazardClass: 4.2
PackingGroup: III