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Physical & Chemical properties

Flammability

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Endpoint:
flammable solids
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
other:
Justification for type of information:
JUSTIFICATION FOR DATA WAIVING
Burning means a chemical reaction with oxygen releasing energy in the form of heat and light. Nitrogen is in the highest oxidation state (+5) and will not (further) react with oxygen. Magnesium has a stable oxidation state (+2) and will not react with anything. Magnesium nitrate is therefore concluded to be a stable non-flammable salt. It can not be ignited by a flame and it will not propagate combustion along a substance pile. The substance is concluded to be not flammable by ignition.
Endpoint:
substances / mixtures which in contact with water emit flammable gases
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
the study does not need to be conducted because the substance is known to be soluble in water to form a stable mixture
Justification for type of information:
JUSTIFICATION FOR DATA WAIVING
The substance is very soluble in water and forms a stable mixture of magnesium and nitrate ions. Nitrate anion will not react with water. Magnesium has a stable oxidation state (+2) and will not react with anything. Magnesium nitrate is therefore concluded to be a stable non-flammable salt.
Endpoint:
pyrophoric solids
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
the study does not need to be conducted because the substance is known to be stable in contact with air at room temperature for prolonged periods of time (days) and hence, the classification procedure does not need to be applied
Justification for type of information:
JUSTIFICATION FOR DATA WAIVING
Nitrogen is in the highest oxidation state (+5) and will not react with atoms in the air. Magnesium has a stable oxidation state (+2) and will not react with anything. Magnesium nitrate is therefore concluded to be a stable non-flammable salt. Experience in handling confirmed that the substance does not ignite spontaneously on coming into contact with air at normal temperatures.
Endpoint:
self-heating substances / mixtures
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
other:
Justification for type of information:
JUSTIFICATION FOR DATA WAIVING
Nitrogen is in the highest oxidation state (+5) and will not react exothermic with oxygen. Magnesium has a stable oxidation state (+2) and will not react with anything. Magnesium nitrate is therefore concluded to be a stable non-flammable salt.

The anhydrous magnesium nitrate is very hygroscopic. It is stable in the hexahydrate form.
Magnesium nitrate (anhydrous) is an inorganic oxidizing salt. Heating will result in oxidation of the Magnesium ion and reduction of the nitrate ion forming Magnesium oxide, oxygen and nitrogen oxides.

Magnesium nitrate does not contain groups that may react with oxygen.

The substance has a widespread use and is not known as a self-heating substance.

Description of key information

Based on molecular structure and/or experience in handling, it was concluded that magnesium nitrate (anhydrous and hexahydrate) is not flammable when coming into contact with an ignition source, water or air.

Key value for chemical safety assessment

Flammability:
non flammable

Additional information

JUSTIFICATION FOR WAIVING:

Flammability (solids):

Burning means a chemical reaction with oxygen releasing energy in the form of heat and light. Nitrogen is in the highest oxidation state (+5) and will not (further) react with oxygen. Magnesium has a stable oxidation state (+2) and will not react with anything. Magnesium nitrate is therefore concluded to be a stable non-flammable salt. It can not be ignited by a flame and it will not propagate combustion along a substance pile. The substance is concluded to be not flammable by ignition.

Flammability (in contact with water):

The substance is very soluble in water and forms a stable mixture of magnesium and nitrate ions. Nitrate anion will not react with water. Magnesium has a stable oxidation state (+2) and will not react with anything. Calcium nitrate is therefore concluded to be a stable non-flammable salt.

Flammability (pyrophoric properties):

Nitrogen is in the highest oxidation state (+5) and will not react with atoms in the air. Magnesium has a stable oxidation state (+2) and will not react with anything. Magnesium nitrate is therefore concluded to be a stable non-flammable salt. Experience in handling confirmed that the substance does not ignite spontaneously on coming into contact with air at normal temperatures.

Flammability (self-heating):

- Nitrogen is in the highest oxidation state (+5) and will not react exothermic with any atom in the air. Magnesium has a stable oxidation state (+2) and will not react with anything. Magnesium nitrate is therefore concluded to be a stable non-flammable salt.

- The anhydrous magnesium nitrate is very hygroscopic. It is stable in the tetrahydrate form.

- Magnesium nitrate (anhydrous) is an inorganic oxidizing salt. Heating will result in oxidation of the Magnesium ion and reduction of the nitrate ion forming Magnesium oxide, oxygen and nitrogen oxides.

- Magnesium nitrate does not contain groups that may react with oxygen.

- The substance has a widespread use and is not known as a self-heating substance.

Justification for classification or non-classification

Based on the available data, no classification for magnesium nitrate (anhydrous and hexahydrate) according to CLP Regulation (EC) No 1272/2008 for the following hazards:

- Flammable solids

- Pyrophoric solids

- Self-heating substances

- Substances which in contact with water emits flammable gases