Guanidinium nitrate

Oxidising properties

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.17 (Oxidising Properties (Solids))

GLP compliance:

yes

Contact with:

powdered cellulose

Duration of test (contact time):

ca. 52 s

Key result

Sample tested:

test mixture as specified

Remarks:

Test item : Cellulose = 2 : 1

Parameter:

preliminary test

Result:

ca. 52 s

Remarks on result:

slow smouldering

Key result

Sample tested:

test mixture as specified

Remarks:

Test item : cellulose = 10 : 90

Parameter:

maximum burning rate

Result:

ca. 1.6 mm/s

Remarks on result:

fuming

Preliminary test

About 12 g of the test substance mixture were prepared and used to form the test pile.

After the ignition charring without flames of the pile was observed. The reaction was finished after

52 seconds. As this result was not definite to decide whether the test substance should be assessed

as an oxidizing substance the main test procedure was performed.

Main test

Reference mixtures (barium nitrate/cellulose)	Highest value of burning rate [mm/s]
50: 50	2.90
60: 40	4.24
70: 30	3.92

Test substance mixtures (Guadinine nitrate /cellulose)	Highest value of burning rate [mm/s]
10: 90	1.60
20: 80	reaction stopped after 14 s at 20 mm distance
30: 70	charring around the ignition flame, no propagation of reaction
40: 60	charring around the ignition flame, no propagation of reaction
50: 50	charring around the ignition flame, very low propagation of reaction
60: 40	reaction stopped after 46 s at 10 mm distance
70: 30	reaction stopped after 235 s at 125 mm distance
80: 20	reaction stopped after 30 s at 10 mm distance
90: 10	melting and brown colouring around the ignition flame, no propagation of reaction

 (In all cases, the reaction was only charring with strong evolution of smoke.)

The highest burning rate of 1.60 mm/s was obtained with the mixture of 10%test item:

90 % cellulose. As this rate was significantly lower than the highest rate of the reference mixtures,

only one single trial with this mixing ratio was performed. In all other mixing ratios, no propagation to

the end of the pile (200 mm distance) was achieved. Therefore, only single tests were performed,

too. Furthermore, no graphic evaluation was necessary.

The "highest" burning rate of 10 : 90 mixture which was the only mixture with propagation of the

reaction to the end of the pile was lower than the highest rate of the reference mixtures.

Interpretation of results:

GHS criteria not met

Conclusions:

Guanidine nitrate has no oxidizing properties according to the definition in the EEC-guideline 92/69/EWG, A.17.

Executive summary:

Guanidine nitrate has no oxidizing properties according to the definition in the EEC-guideline 92/69/EWG, A.17.

Reference 2

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

test procedure in accordance with national standard methods with acceptable restrictions

Qualifier:

equivalent or similar to guideline

Guideline:

other: company SOP

GLP compliance:

not specified

Sample tested:

reference mixture as specified

Remarks:

Ba(NO3)2 : Cellulose = 2 : 1

Parameter:

preliminary test

Remarks on result:

flaming

Remarks:

slow

Key result

Sample tested:

test mixture as specified

Remarks:

GuNi : Cellulose = 2 : 1

Parameter:

preliminary test

Remarks on result:

mixture does not ignite and burn

Interpretation of results:

GHS criteria not met

Conclusions:

Guanidine nitrate is not oxidising according to result of preliminary test.
No ignition (preliminary test) of the mixture Guanidine nitrate:Cellulose (2:1)

Executive summary:

Guanidine nitrate is not oxidising according to result of preliminary test.

No ignition (preliminary test) of Guanidine nitrate:Cellulose mixture (2:1)

Reference 3

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

1994-01-10 to 1994-01-26

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

test procedure in accordance with national standard methods with acceptable restrictions

Qualifier:

equivalent or similar to guideline

Guideline:

other: company SOP

GLP compliance:

not specified

Key result

Sample tested:

1:1 sample-to-cellulose ratio

Remarks:

sawdust

Parameter:

mean burning time

Result:

> 2.5 - < 4 min

Remarks on result:

fuming

Key result

Sample tested:

4:1 sample-to-cellulose ratio

Parameter:

mean burning time

Result:

> 1.75 - < 3 min

Remarks on result:

fuming

Interpretation of results:

GHS criteria not met

Conclusions:

Substance is classified as Lighting active material (presenting oxidising potential properties) according to German TRGS 515 Category 5.1 Group C. According to the experimental results the oxidizing properties of guanidinium nitrate are comparable to those of Ammonium peroxydisulfate.

Executive summary:

Substance is classified as Lighting active material (presenting oxidising potential properties) according to German TRGS 515 Category 5.1 Group C. According to the experimental results the oxidizing properties of guanidinium nitrate are comparable to those of Ammonium peroxydisulfate.

Description of key information

Guanidine nitrate has no oxidizing properties.

Key value for chemical safety assessment

Oxidising properties:

non oxidising

Additional information

Guanidine nitrate has no oxidizing properties according to a valid (Klimisch 1) test following EEC- guideline 92/69/EWG, A.17 (AlzChem, 2004) and GLP. The test was made with a test substance (>99% guanidine nitrate) from current production with batch number and batch specific information about composition/impurities.

This finding is supported by Mayrhuber (1994) who found in a preliminary test with Guanidine nitrate according to “Europäische Gemeinschaft Nr. L383 A/102” no oxidising properties. The test substance was not further specified.

In contrast, in a study of Hellemeir (1994) the substance is classified as Lighting active material (presenting oxidising potential properties) according to German TRGS 515 Category 5.1 Group C. This test made with unspecified test material (no batch number, no composition given). The test validity was Klimisch 2. According to the author, the experimental results show the oxidizing properties of guanidinium nitrate are comparable to those of Ammonium peroxydisulfate.

The first study is used for the evaluation: Guanidine nitrate has no oxidising properties. The study shows the highest validity, it was made with a well defined substance from current production and was performed according to EEC- guideline 92/69/EWG, A.17.

Justification for classification or non-classification

Guanidine nitrate has no oxidizing properties according to a valid (Klimisch 1) test following EEC- guideline 92/69/EWG, A.17 (AlzChem, 2004) and GLP.

This stands in contradiction to the transport classificition UN-Nr. 1467 as class 5.1. Nevertheless we have our own experimental data which would lead to no classification in this case.