Section 1 - CHEMICAL PRODUCT AND COMPANY IDENTIFICATION

PRODUCT NAME

HEXAMETHYLENE DIISOCYANATE BIURET

NFPA

PRODUCT USE

Prepolymer. Usually available as the polymer. Less volatile tha hexamethylene isocyanate
and has been preferred in some applications Persons with a history of asthma or other
respiratory problems or are known to be sensitised, should not be engaged in any work
involving the handling of isocyanates. [CCTRADE- Bayer, APMF].

SYNONYMS

C23-H38-N6-O5, "imidodicarbonic diamide, N, N', 2-tris(6-isocyanatohexyl)-",
"imidodicarbonic diamide, N, N', 2-tris(6-isocyanatohexyl)-", "N, N', 2-tris(6-
isocyanatohexyl)imidodicarbonic diamide", "N, N', 2-tris(6-
isocyanatohexyl)imidodicarbonic diamide", "isocyanic acid, triester with 1, 3, 5-tris(6-
hydroxyhexyl)biuret", "isocyanic acid, triester with 1, 3, 5-tris(6-hydroxyhexyl)biuret",
tris(isocyanatohexyl)biuret, tris(6-isocyanatohexyl)biuret, "biuret of HDI", "HDI biuret",
"polymeric HDI", "1, 3, 5-tris(6-isocyanatohexyl)biuret", "1, 3, 5-tris(6-
isocyanatohexyl)biuret", "biuret of 1, 6-hexamethylene diisocyanate", "biuret of 1, 6-
hexamethylene diisocyanate", "hexamethylenediisocyanate biuret"

Section 2 - HAZARDS IDENTIFICATION

CANADIAN WHMIS SYMBOLS

EMERGENCY OVERVIEW

RISK

Toxic by inhalation.
Irritating to eyes, respiratory system and skin.

POTENTIAL HEALTH EFFECTS

ACUTE HEALTH EFFECTS

SWALLOWED

  Although ingestion is not thought to produce harmful effects, the material may still be damaging to the health of the individual following ingestion, especially where pre-  existing organ (e.g. liver, kidney) damage is evident. Present definitions of harmful or toxic substances are generally based on doses producing mortality (death) rather than those producing morbidity (disease, ill-health). Gastrointestinal tract discomfort may produce nausea and vomiting. In an occupational setting however, ingestion of insignificant quantities is not thought to be cause for concern.  Considered an unlikely route of entry in commercial/industrial environments.  

EYE

  This material can cause eye irritation and damage in some persons.  The material may produce severe irritation to the eye causing pronounced inflammation. Repeated or prolonged exposure to irritants may produce conjunctivitis.  

SKIN

  This material can cause inflammation of the skin oncontact in some persons.  Skin contact is not thought to have harmful health effects, however the material may still produce health damage following entry through wounds, lesions or abrasions.  Sensitization reactions may appear suddenly after repeatedsymptom free exposures.  Sensitization may result in allergic dermatitis responses includingrash, itching, hives or swelling of extremities.  Toxic effects may result from skin absorption.  Bare unprotected skin should not be exposed to this material.  The material may cause severe skin irritation after prolonged or repeated exposure and may produce on contact skin redness, swelling, the production of vesicles, scaling and thickening of the skin. Repeated exposures may produce severe ulceration.  

INHALED

  If inhaled, this material can irritate the throat andlungs of some persons.  Inhalation of the vapor is hazardous and may even be fatal.  The material may produce respiratory tract irritation, and result in damage to the lung including reduced lung function.  Respiratory sensitization may result in allergic/asthma like responses; from coughing and minor breathing difficulties to bronchitis with wheezing, gasping.  

CHRONIC HEALTH EFFECTS

  There is some evidence that inhaling this product is more likely to cause a sensitization reaction in some persons compared to the general population.  

  Principal routes of exposure are usually by inhalation of vapor and skin contact/absorption.  Sensitization may give severe responses to very low levels of exposure, i.e. hypersensitivity. Sensitized persons should not be allowed to work in situations where exposure may occur.  Extreme care must be taken when handling this material