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Oasis® & Strass® MSDS explained June 2019


Florists use green Oasis floral foam to model arrangements and allow flowers to soak and drink water. In short, floral foams can be almost every floral arrangement you buy or send.

Floral foam is basically a plastic. Being a plastic, floral foam is not exactly perfect for you and the environment. Biodegradable floral foam has started to emerge on the market recently but has not been embraced on a large scale yet. This makes it hard because flower arranging would not be the same without such a product. You could go back to the old days of floristry and use hay, chicken wire, curled branches, and balls of wire. These take a great deal of time to prepare. Unfortunately time is money these days.

I always wonder why florists do not avoid plastics like foam but also understand that for commercial reasons, they have no choice. 

This article covers all floral foam items from both Oasis and Strass brands, including floral foam blocks and floral foam accessories. 



Floral foam is an open cell plastic. It is a green fine-celled thermoset phenolic plastic foam.

It contains formaldehyde, carbon black, proprietary acid catalysts, proprietary sulfactant and barium sulphate.

Prolonged exposure to formaldehyde and carbon black may cause cancer. The concentration of these ingredients in foam are very small.

It is a degradable plastic (eventually will break down to dust) but NOT biodegradable (completely break down to its natural form).

Some of these ingredients may be harmful to the environment.

Use floral foam in a well ventilated environment.



Chemical Characterization: Mixtures

Description: Mixture of substances listed below with nonhazardous additions.

Hazardous Components:

50-00-0      formaldehyde     <0.1%

108-95-2    phenol <0.1%



Precautions for Safe Handling:
Use of safe work practices are recommended to avoid eye or skin contact and inhalation of dust.

Food, beverages and tobacco products should not be stored or consumed where this material is in use.

Always wash hands before smoking, eating, drinking or using the toilet. Wash contaminated clothing and other protective equipment before storage or re-use. Provide eyewash fountains and safety showers in close proximity to points of potential exposure.

Conditions for Safe Storage:
Store in a cool, dry and well ventilated area, out of direct sunlight. Foam stored in stagnant or hot enclosures may result in off-gassing of residual formaldehyde gas. Keep away from strong oxidising agents, strong acids and bases.

Store in a cool, dry well ventilated area, out of direct sunlight. Foam stored in stagnant or hot enclosures may result in off-gassing of residual formaldehyde gas.



Finished foam will support combustion if it is ignited by direct contact with an open flame or exposed to temperatures in the range of 300 degrees Celsius.

Do not put foam into a microwave as it will burn after an extended period of time. Combustion occurs at the centre of the brick and due to the insulating effect of the foam, can proceed unnoticed until an appreciable heat build up occurs.

Hazardous combustion products include oxides of carbon and sulphur dioxide. 

Suitable extinguishing media: Alcohol resistant foam, carbon dioxide, dry chemical and water spray.



When being exposed to or using floral foam, the two main concerns to consider are contact with the foam and inhalation of the dust. Using floral foam may cause irritation to skin, eyes, and respiratory tract.

  • Inhalation

If dust is excessive, a dust mask is recommended. Use floral foam in a well ventilated environment.

Inhalation care: Remove from exposure to fresh air. If breathing has stopped, give artificial respiration. Oxygen may be given if breathing is difficult. Get medical attention.

Acute: Dust or fumes may cause irritation to the nasal passages, lacrimation, olfactory changes, and pulmonary changes.

Inhalation of heptane fumes may irritate the respiratory tract producing light headedness, dizziness, muscle incoordination, CNS depression and narcosis.

Chronic: Prolonged exposure to formaldehyde and/or carbon black may cause cancer.

  • Eye protection:

If dust is excessive, safety glasses with top and side shields are recommended. Use floral foam in a well ventilated environment.

Eye contact care: Flush thoroughly with water for 15 minutes, occasionally lifting the upper and lower lids, until no evidence of the material remains. Get medical attention if irritation develops. If wearing contact lenses, remove immediately and flush eyes as above.

Acute: Contact may be irritating.

Chronic: May cause conjunctivitis.

  • Skin protection:

Use barrier cream or choose appropriate protective gloves. Wash thoroughly after handling. Observe good personal and industrial hygiene procedures.
When foam is soaked or used in water, some low levels of residual formaldehyde may accumulate in tub water. Repeated skin immersion in water containing formaldehyde has caused skin rashes, particularly in sensitive persons.
It is recommended that impervious latex or chemical resistant gloves be worn and water tubs be emptied regularly.

Skin contact care: Wash affected area with soap and water until no evidence of the material remains. Get medical attention if irritation develops.

Acute: May cause irritation.

Chronic: May cause dermatitis. Frequent or prolonged exposure to formaldehyde can cause hypersensitivity leading to contact dermatitis.

  • Ingestion:

If swallowed, do not induce vomiting. Treat symptomatically and supportively. If a large quantity is ingested, seek medical attention since there could be a problem with physical blockage. Do not give anything by mouth to an unconscious person. 

Acute: May cause mouth irritation due to local pH effect. Swallowing formaldehyde may cause violent vomiting and diarrhea.

Aspiration of heptane into lungs can produce severe lung damage.

Chronic: Prolonged exposure may cause symptoms similar to acute effects.


Update date: June 2019


For more information and resources about Floral Foam, read our other articles:


Visit our website to browse our range of floral foam products.