O,O-diisopropyl hydrogen dithiophosphate

Guidance on Safe Use

First-aid measures

Description of first aid measures       

If exposure has occurred, do not wait for symptoms to develop, but immediately start the procedures described below. Immediately remove the exposed person from the area where the product is present.

Inhalation              

If experiencing any discomfort, immediately remove from exposure. Light cases: Keep person under surveillance. Get medical attention immediately if symptoms develop. Serious cases: Get medical attention immediately or call for an ambulance.

If breathing has stopped, immediately start artificial respiration and maintain until a physician takes charge of the exposed person.

Skin contact              

Immediately flush with much water while removing contaminated clothing and footwear. Wash with water and soap. See physician immediately if irritation develops.

Eye contact              

Immediately rinse eyes with much water or eyewash solution, occasionally opening eyelids, until no evidence of chemical remains. Remove contact lenses after a few minutes and rinse again. See physician immediately.

Ingestion              

Let the exposed person rinse mouth and let him/her drink several glasses of water or milk, but do not induce vomiting. If vomiting does occur, let him/her rinse mouth and drink fluids again. Never give anything by mouth to an unconscious person. Make the exposed person lie down and keep him/her steady. Get medical attention immediately.

Most important symptoms and effects, both acute and delayed       I

Substance causes irritation/burns to eyes, skin and airways.

      

Indication of any immediate medical attention and special treatment needed       

Call a doctor (physician), clinic or hospital immediately in case of eye contact or ingestion. Describe the condition of the exposed person and the extent of exposure.

Note to physician              

Irritated skin should be treated as usual against effects of acids or acid fumes. In case lungs are affected watch for pulmonary

Fire-fighting measures

Extinguishing media              

Dry chemical or carbon dioxide for small fires, water spray or foam for large fires. Avoid heavy hose streams.

      

Special hazards arising from the substance or mixture       

The essential breakdown products on combustion are volatile, toxic, irritant, malodorous and inflammable compounds such as: hydrogen sulphide, sulphur dioxide, isopropyl mercaptan, diisopropyl sulphide, phosphorous pentoxide, carbon monoxide and carbon dioxide.

Substance hydrolyses in the presence of water under formation of hydrogen sulphide and development of heat. Therefore, do not use water jet on a leaking container.

Advice for firefighters              

Use water spray to keep fire-exposed containers cool. Approach fire from upwind to avoid hazardous vapours and toxic decomposition products. Fight fire from protected location or maximum possible distance. Dike area to prevent water runoff. Firemen should wear self-contained breathing apparatus and protective clothing.

Accidental release measures

Personal precautions, protective equipment and emergency procedures       

It is recommended to have a predetermined plan for the handling of spills. Empty, closable vessels (not metal) for the collection of spills should be available.

Use personal protection equipment when cleaning up spills. Depending on the magnitude of the spill this may mean wearing respirator, face mask or eye protection, chemical resistant clothing, gloves and rubber boots. Personal exposure by splashing must be avoided.

Stop the source of the spill immediately if safe to do so. Keep unprotected persons away from the spill area. Remove sources of ignition. Avoid and reduce mist formation as much as possible.

Environmental precautions              

Contain the spill to prevent any further contamination of surface, soil or water. Wash waters must be prevented from entering surface water drains. Uncontrolled discharge into water courses must be alerted to the appropriate regulatory body.

Methods and materials for containment and cleaning up       

It is recommended to consider possibilities to prevent damaging effects of spills, such as bunding or capping.

If appropriate, surface water drains should be covered. Spills on the floor or other impervious surface should be absorbed onto an absorptive material such as universal binder, hydrated lime, Fuller’s earth or other absorbent clays. Collect the contaminated absorbent in suitable containers. Rinse area with soda lye and much water. Absorb wash liquid with absorbent and transfer to suitable containers. The used containers should be properly closed and labelled.

Large spills which soak into the ground should be dug up and transferred to suitable containers.

Spills in water should be contained as much as possible by isolation of the contaminated water. The contaminated water must be collected and removed for treatment or disposal.

Handling and storage

Precautions for safe handling              

Substance is of limited stability, but when stored in coated, unopened drums at temperatures not exceeding 20 - 25°C, the decomposition is slow.

      

Heating above 55°C may only take place in connection with further processing of substance and then only temporarily and under controlled conditions.

      

In an industrial environment it is recommended to avoid all personal contact with the product, if possible by using closed systems with remote system control. Otherwise, the material should be handled by mechanical means as much as possible. Adequate ventilation or local exhaust ventilation is required. The exhaust gases should be filtered or treated otherwise.

      

Do not discharge to the environment.

Conditions for safe storage, including any incompatibilities       Like other acids, substance will corrode iron. Corrosion of iron is further activated by the presence of water. Storage should therefore take place in unopened drums or in properly protected tanks (e.g. lined with glass, polypropylene, epoxy or phenolic resin) in an inert gas atmosphere (e.g. nitrogen).

If free from moisture, tanks of acid-resistant steel, such as 316 or V4A, can also be employed.

Storage at temperatures not exceeding 25°C is recommended.

Substance should not be heated above 55°C and also local heating above this temperature should be avoided. Protect against strong heat from sunshine or other source, e.g. fire.

      

Specific end use(s)

The substance is a chemical intermediate for industrial use only.

Transport information

Land transport (UN RTDG/ADR/RID)

UN number:

3265

Shipping information

Proper shipping name and description:

Corrosive liquid, acidic, organic, n.o.s. (O,O-Diisopropyl phosphorodithioic acid)

Chemical name:

O,O-diisopropyl hydrogen dithiophosphate

Language:

English

SpecialProvisions

Inland waterway transport (UN RTDG/ADN(R))

UN number:

3265

Shipping

Remarks

Marine transport (UN RTDG/IMDG)

UN number:

3265

Shipping information

Proper shipping name and description:

Corrosive liquid, acidic, organic, n.o.s. (O,O-Diisopropyl phosphorodithioic acid)

Chemical name:

O,O-diisopropyl hydrogen dithiophosphate

Remarks

Air transport (UN RTDG/ICAO/IATA)

UN number:

3265

Shipping information

Proper shipping name and description:

Corrosive liquid, acidic, organic, n.o.s. (O,O-Diisopropyl phosphorodithioic acid)

Chemical name:

O,O-diisopropyl hydrogen dithiophosphate

Remarks

SpecialProvisions

Exposure controls / personal protection

When used in a closed system, personal protection equipment will not be required. The following is meant for other situations, when the use of a closed system is not possible, or when it is necessary to open the system. Consider the need to render equipment or piping systems non-hazardous before opening. Avoid and reduce mist formation as much as possible.

Avoid contact with eyes, skin or clothing. Avoid breathing vapour and avoid exposure of eyes to vapour as well.

Inhalation of vapours must be avoided, preferentially by mechanical means. If protection of workers by mechanical means is not possible, a face mask or officially approved respiratory protection equipment with a combination filter type against acids including particle filter must be used.

Wear chemical resistant gloves, such as barrier laminate, butyl rubber or nitrile rubber. The breakthrough times of these materials for this product are unknown. Generally, however, the use of protective gloves will give only partial protection against dermal exposure. Small tears in the gloves and cross-contamination can easily occur. It is recommended to shift the gloves frequently and to limit the work to be done manually. Before removing gloves, wash them with water and soap.

Wear face mask rather than safety glasses or goggles. It is recommended to have an eye wash fountain immediately available in the workplace when there is a potential for eye contact.

Wear appropriate chemical resistant clothing to prevent skin contact depending on the extent of exposure. During most normal work situations where exposure to the material cannot be avoided for a limited time-span, waterproof pants and apron of chemical resistant material or coveralls of PE will be sufficient. Coveralls of PE must be discarded after use if contaminated. In cases of appreciable or prolonged exposure, coveralls of barrier laminate may be required.

Remove contaminated clothing immediately. Wash thoroughly after handling. After work, take off all work clothes and footwear. Take a shower, using water and soap. Wear only clean clothes when leaving job. Wash protective clothing and protective equipment with water and soap after each use.

Stability and reactivity

Reactivity              

The product is an acid.

Chemical stability              

See Handling and storage above

      

Possibility of hazardous reactions       

Strong alkalis. An acid-base neutralisation reaction can be hazardous because of heat release.

Amines and strong oxidising compounds.

The substance can corrode metals. The presence of moisture accelerates the corrosion appreciably.

Conditions to avoid              

Substance will decompose rapidly when heated to temperatures above 100°C, significantly increasing the risk of explosion.

The decomposition is dependent on time as well as temperature due to self-accelerating exothermic and autocatalytic reactions. The reactions involve rearrangements and polymerisation releasing volatile malodorous and inflammable compounds such as isopropyl mercaptan, diisopropyl sulphide, carbon monoxide and hydrogen sulphide.

Incompatible materials

Strong alkalis. An acid-base neutralisation reaction can be hazardous because of heat release.

Amines and strong oxidising compounds.

The substance can corrode metals. The presence of moisture accelerates the corrosion appreciably.

Disposal considerations

Waste treatment methods              

Remaining quantities of the material and empty but unclean packaging should be regarded as hazardous waste.

According to the Waste Framework Directive (2008/98/EC), possibilities for reuse or reprocessing should first be considered. If this is not feasible, the material can be disposed of by removal to a licensed chemical destruction plant or by controlled incineration with flue gas scrubbing.

Containers can by triply rinsed (or equivalent) and offered for recycling or reconditioning. Alternatively, the packaging can be punctured to make it unusable for other purposes and then be disposed of in a sanitary landfill. Controlled incineration with flue gas scrubbing is possible for combustible packaging materials.

Do not contaminate water or foodstuffs by storage or disposal. Do not discharge to sewerage systems.

Disposal of waste and packagings must always be in accordance with all applicable local regulations.