Corvidal 311
H2S Scavenger - Oil-Soluble
Chemical Overview
Corvidal 311 is a unique hydrogen sulfide scavenger that reacts rapidly with hydrogen sulfide to form oil-soluble bi-products. Corvidal 311 is a non-regulated scavenger that is unaffected by C02 and works efficiently even at low temperatures. Corvidal 311 can be added to oil or condensate.
Typical Physical Properties
| Appearance | Amber Liquid |
| Specific Gravity | 0.80-0.85 |
| Flash Point | ~60°C |
| pH | 10-11 |
| Freeze Point | -40°C |
| Ionic Character | Cationic |
Common Uses
- Condensate sweetening for fluid transport
- Sales oil treating
- Well bleed downs
- Sub-surface process treating
- Scavenging fluids during cleaning operations
- Vapor phase gas stream scavenging
- Effective in neutralizing H2S in aromatic solvents such as
- diesel, kerosene and other low molecular weight alcohols
Features and Advantages
- 100% active H2S reaction is irreversible when pH is neutral or acidic
- Oil-soluble
- Fast
- Enhances control of micro-organisms when added to surfactants and corrosion inhibitors
Safety and Handling
Corvidal 311 is a flammable material and exposure to sparks, open flames, or other sources of ignition should be avoided. Consult the Material Safety Data Sheet for further information.
Non-Regulated Product.

