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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. Calcium has a stable oxidation state (+2) and will not react with anything. Calcium 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 calcium and nitrate ions. Nitrate anion will not react with water. Calcium has a stable oxidation state (+2) and will not react with anything. Calcium nitrate is therefore concluded to be a stable non-flammable salt.
Reason / purpose for cross-reference:
data waiving: supporting information
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. Calcium has a stable oxidation state (+2) and will not react with anything. Calcium 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.
Reason / purpose for cross-reference:
data waiving: supporting information
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. Calcium has a stable oxidation state (+2) and will not react with anything. Calcium nitrate is therefore concluded to be a stable non-flammable salt.

The anhydrous calcium nitrate is very hygroscopic. It is stable in the tetrahydrate form. The melting point of tetrahydrate form is < 160°C.

Calcium 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.
Reason / purpose for cross-reference:
data waiving: supporting information

Description of key information

Based on experience in handling, structural features and/or melting point, the substance was concluded to be:

-not highly flammable;

-not highly flammable in contact with water;

-not pyrophoric;

-not a self-heating substance .

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. Calcium has a stable oxidation state (+2) and will not react with anything. Calcium 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 calcium and nitrate ions. Nitrate anion will not react with water. Calcium 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. Calcium has a stable oxidation state (+2) and will not react with anything. Calcium 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. Calcium has a stable oxidation state (+2) and will not react with anything. Calcium nitrate is therefore concluded to be a stable non-flammable salt.

- The anhydrous calcium nitrate is very hygroscopic. It is stable in the tetrahydrate form. The melting point of tetrahydrate form is < 160°C.

- Calcium 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

No classification is required for the CLP hazards:

- Flammable solids

- Substances which in contact with water emits flammable gases

- Pyrophoric solids

- Self-heating substances