DYNO OR-257 is a water solution of ammonium bisulphite. It
reacts rapidly with dissolved oxygen at a ratio of 10 parts DYNO OR-257 per
part of oxygen. DYNO OR-257 presents no unusual hazards with respect to
handling, and its’ freeze is stable at below -100C.
DYNO OR-257 can also react with other oxidising agents such
as chromates and dicromates. Hypochloride, chlorine, bromine and others.
Furthermore, reaction of DYNO OR-257 with aldehydes can be
used as an aid in the clean-up of spills of some type of bactericides.
theoretical treatment with DYNO OR-257 should be at the ratio of 10:1 (DYNO
OR-257:Oxygen on weight basis). It is sometimes found that low temperatures or
competing side reactions will dictate higher usage. For thiss reason, actual
oxygen concentration should be monitored using a suitable oxygen mater or
colourimetric method in order to optimise treatment. Bactericides containing
aldehydes should not be simultaneously injected with DYNO OR-257 as the effects
of both chemicals would be diminished.
oxygen scavenger is often injected at anearly stage of the system where it
removes oxygen and itself, converted to a different and non-reactive chemical
form. Then the bactericide may be injected with no interference.
should be stored in closed stainless steel, or coated mild steel containers or
in suitable fiber-glass or plastic tanks.
DYNO OR-257 is
used to chemically react with and remove oxygen, chlorine and certain other
oxidising elements from fresh or salt water, water-based drilling fluids, and
water-based packer fluids.
In addition, it
is often used to remove oxygen from water to be used in pipeline hydrotesting,
as well as for scavenging in flood and water injection.
Density (kg/m3)1360 – 1390
Melting point 0C15
Flash point 0CN/A
Viscosity (mPa @
Viscosity (mPa @
product3 – 5
Utility normal precautions for employee
protection when handling chemical products. Use of appropriate respirator.
Gloves, goggles and apron is recommended for employee confort and protection.
DYNO OR-257does not have a restricted classification for transportation by the
international or domestic regulatory agencies.