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EC number: 233-139-2 | CAS number: 10043-35-3
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
Additional physico-chemical information
Administrative data
Link to relevant study record(s)
- Endpoint:
- other: Corrosivity to metals
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2010-05-21 - 2010-05-28
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- other: UN Transport of Dangerous Goods Recommendations, Fourth Revised Edition (Class 8, Packing 8, Packing group III, test C1).
- Deviations:
- not specified
- GLP compliance:
- yes
- Results:
- Steel coupons:
No reaction was observed on submersion of the coupons. On completion of the test some crystallisation was observed on the vessel and on the vapour surface coupons. Rust deposits were observed on all coupons with no significant localised corrosion observed. On completion of the test the sample was observed to be an orange/brown liquid with orange/brown deposits at the bottom of the vessel.
The highest percentage mass loss (over 7 days) on the steel coupons was found to be 2.10 %.
Aluminium coupons:
No reaction was observed on submersion of the coupons. On completion of the test some crystallisation was observed on the vessel and on the vapour surface coupons. Localised corrosion was observed on the submersed coupons. On completion of the test, the sample was observed to contain crystalised solids on the surface.
The highest percentage mass loss (over 7 days) on the aluminium coupons was found to be 1.56 %. The depth of the deepest intructions observed on aluminium coupon numbers 3, 6 and 9 (fully submersed) were also measured and the depths found to be 72 μm, 154 μm and 80 μm respectively.
The percentage mass losses on steel and aluminium were found to be < 13.5 % over 7 days, however the maximum pit depth on the aluminium coupons was > 120 μm. The saturated solution of boric acid was therefore a candidate for classification as a corrosive substance of UN Class 8, Packing group III ( according to the UN Transport of Dangerous Goods Recommendations). - Conclusions:
- The percentage mass losses on steel and aluminium were found to be < 13.5 % over 7 days, however the maximum pit depth on the aluminium coupons was > 120 μm. The saturated solution of boric acid was therefore a candidate for classification as a corrosive substance of UN Class 8, Packing group III (according to the UN Transport of Dangerous Goods Recommendations).
- Executive summary:
Corrosivity to metal of the test-item was assessed in a GLP-study according to UN Transport of Dangerous Goods Recommendations, Fourth Revised Edition (Class 8, Packing 8, Packing group III, test C1).
The percentage mass losses on steel and aluminium were found to be < 13.5 % over 7 days, however the maximum pit depth on the aluminium coupons was > 120 μm. The saturated solution of the sample was therefore a candidate for classification as a corrosive substance of UN Class 8, Packing group III (according to the UN Transport of Dangerous Goods Recommendations).
- Endpoint:
- other: Explosivity of dust cloud
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2003
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with national standard methods with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- other: No data
- Deviations:
- not specified
- Principles of method if other than guideline:
- A spatula test and an ignition tube test were used to assess the flammability of a dust cloud.
- GLP compliance:
- yes
- Results:
- Spatula test result:
The sample melted to a clear liquid emitting small quantity of grey smoke, which ignited with a small green, nonsustaining flame. On completion of testing a white material remained.
Ignition tube result:
The sample melted to a clear liquid emitting small quantity of grey smoke, which ignited with a small green, nonsustaining flame. On completion of testing a white material remained. - Conclusions:
- In both the spatula test and the ignition tube test the sample melted to a clear liquid emitting small quantity of grey smoke, which ignited with a small green, non-sustaining flame. On completion of testing a white material remained.
- Executive summary:
A spatula test and an ignition tube test were used to assess the flammability of a dust cloud of the test item in a GLP-study.
In both the spatula test and the ignition tube test the sample melted to a clear liquid emitting small quantity of grey smoke, which ignited with a small green, non-sustaining flame. On completion of testing a white material remained.
- Endpoint:
- other: Emisison of flammable gas when in contact with water.
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2010-6-04 - 2010-06-07
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- other: UN Recommendation on the Transportation of Dangerous Goods, Manual of Tests and Criteria for substances of Class 4, Division 4.3.
- Deviations:
- not specified
- GLP compliance:
- yes
- Results:
- It was determined that the test sample is not classified as a material of class 4.3. The gas was not tested for flammability.
- Conclusions:
- It was determined that the test item should be classified as not a material of Class 4.3 according to the UN recommendations on the Transportation of Dangerous Goods
- Executive summary:
The test sample was assessed in a GLP study according to UN Recommendation on the Transportation of Dangerous Goods, Manual of Tests and Criteria for substances of Class 4, Division 4.3 if the test item emits flammable gases when it comes in contact with water. It was determined that the test sample is not classified as a material of class 4.3. The gas was not tested for flammability.
- Endpoint:
- other: Dustiness
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2010-06-26 - 2010-07-06
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- other: CIPAC method MT 171
- Deviations:
- not specified
- GLP compliance:
- yes
- Results:
- The results showed that boric acid granular did not produce significant amounts of dust and was nearly dust free. Boric acid powder did produce a significant amount of dust and was classified as dusty.
- Conclusions:
- The dustiness of boric acid granular (d50 mm 0.608) and boric acid powder (d50 mm 0.051) were assessed according to CIPAC method MT 171. Boric acid granular did not produce significant amounts of dust and was nearly dust free. Boric acid powder did produce a significant amount of dust and was classified as dusty.
- Executive summary:
The dustiness of boric acid granular (d50 mm 0.608) and boric acid powder (d50 mm 0.051) were assessed according to CIPAC method MT 171 in a GLP-study. Boric acid granular did not produce significant amounts of dust and was nearly dust free. Boric acid powder did produce a significant amount of dust and was classified as dusty.
- Endpoint:
- other: Dustiness
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- 2010-06-26 - 2010-07-06
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- other: CIPAC Method MT 171
- Deviations:
- not specified
- GLP compliance:
- yes
- Results:
- The results showed that boric acid TP with a particle size (d50) of 119 μm did produce some dust but was essentially non-dusty.
- Conclusions:
- Boric acid TP was assessed for dustiness according to CIPAC method MT 171. Boric acid TP (d 50 119 μm) did produce some dust but was essentially non-dusty.
- Executive summary:
Boric acid TP was assessed for dustiness according to CIPAC method MT 171 in a GLP-study. Boric acid TP (d 50 119 μm) did produce some dust but was essentially non-dusty.
Referenceopen allclose all
Test results for steel coupons:
Coupon no. |
Position of coupon |
Initial mass (g) |
Final mass (g) |
Weight loss (g) |
Percentage mass loss (%) |
1 |
Vapour space |
15.5737 |
15.5463 |
0.0274 |
0.18 |
2 |
Half submerged |
15.5848 |
15.3705 |
0.2143 |
1.38 |
3 |
Fully submerged |
15.4493 |
15.1422 |
0.3071 |
1.99 |
4 |
Vapour space |
15.5197 |
15.4997 |
0.02 |
0.13 |
5 |
Half submerged |
15.6282 |
15.4199 |
0.02083 |
1.33 |
6 |
Fully submerged |
15.5231 |
15.2221 |
0.301 |
1.94 |
7 |
Vapour space |
15.6317 |
15.6003 |
0.0314 |
0.20 |
8 |
Half submerged |
15.5838 |
15.3218 |
0.262 |
1.68 |
9 |
Fully submerged |
15.6516 |
15.3236 |
0.328 |
2.10 |
Test results for aluminium coupons:
Coupon no. |
Position of coupon |
Initial mass (g) |
Final mass (g) |
Weight loss (g) |
Percentage mass loss (%) |
1 |
Vapour space |
5.7010 |
5.7005 |
0.0005 |
0.01 |
2 |
Half submerged |
5.7485 |
5.7392 |
0.0093 |
0.16 |
3 |
Fully submerged |
5.7217 |
5.7162 |
0.0055 |
0.10 |
4 |
Vapour space |
5.7718 |
5.7709 |
0.0009 |
0.02 |
5 |
Half submerged |
5.7141 |
5.7102 |
0.0039 |
0.07 |
6 |
Fully submerged |
5.350 |
5.7284 |
0.0066 |
0.12 |
7 |
Vapour space |
5.7640 |
5.6742 |
0.0898 |
1.56 |
8 |
Half submerged |
5.7754 |
5.7666 |
0.0088 |
0.15 |
9 |
Fully submerged |
5.7655 |
5.7517 |
0.0138 |
0.24 |
Test results:
Run |
Powder quantity (g) |
Max rate of gas generation (L.hr-1.kg-1) |
Ignition/no ignition |
1 |
10 |
0.14 |
No ignition |
2 |
25 |
0.11 |
No ignition |
3 |
25 |
0.05 |
No ignition |
Dustiness:
Test item |
Batch/ Reference No. |
Weight of filter disk before dust collection (mg) |
Weight of filter disk after dust collection (mg) |
Weight of dust collected |
Dust category |
Assessment of dustiness |
Boric acid (tech grade granular) |
N/A |
59.9 |
60.9 |
1.0 |
1 |
Nearly dust free |
Boric acid (powder)* |
4270 |
57.7 |
135.8 |
78.1 |
3 |
Dusty |
4270 |
60.9 |
150.1 |
89.2 |
3 |
Dusty |
*For the boric acid powder the analysis was carried out in duplicate as there was enough sample for more than one determination. The second result was based on a sample weight of less than 30 g (28.4081 g) but both results fall into the dust category 3 which is dusty.
Dustiness:
Test item |
Weight of filter disk before dust collection (mg) |
Weight of filter disk after dust collection (mg) |
Weight of dust collected |
Dust category |
Assessment of dustiness |
Boric acid (Boric acid TP) |
54.2 |
69.4 |
15.2 |
2 |
Essentially non-dusty |
Description of key information
GLP-Studies were performed according to UN Transport of Dangerous Goods Recommendations, Fourth Revised Edition (Class 8, Packing 8, Packing group III, test C1) on corrosivity to metals; and according to UN Recommendation on the Transportation of Dangerous Goods, Manual of Tests and Criteria for substances of Class 4, Division 4.3, on the emission of flammable gases on contact with water were conducted. The percentage mass losses on steel and aluminium were found to be < 13.5 % over 7 days, however the maximum pit depth on the aluminium coupns was > 120 μm. The saturated solution of boric acid was therefore a candidate for classification as a corrosive substance of UN Class 8, Packing group III ( according to the UN Transport of Dangerous Goods Recommendations). It was determined that the test sample is not classified as a material of class 4.3. The gas was not tested for flammability.
GLP-Studies on dustiness were performed according to CIPAC method MT 171 and showed that boric acid granular was dust category 1 - nearly dust free; boric acid TP was dust category 2 - essentially non-dusty and boric acid powder was dust category 3 - dusty. This sample represents the finest grade placed on the market.
The dust explosion behaviour was also assessed in a GLP study. A spatula test and an ignition tube test were used to assess the flammability of a dust cloud of the test item.
In both the spatula test and the ignition tube test the sample melted to a clear liquid emitting small quantity of grey smoke, which ignited with a small green, non-sustaining flame. On completion of testing a white material remained.
Additional information
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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