Registration Dossier
Registration Dossier
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EC number: 276-763-0 | CAS number: 72676-55-2
Additional physico-chemical information
Administrative data
- Endpoint:
- other: Dust flammability, explosibility and thermal instability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- May 1995
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 995
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- other: ISO 6184/1 (1985) -- Determination of Explosion Indices of Combustible Dusts in Air.
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- other: BS 6713: Part 1: 1986 Explosion Protection systems.
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- other: ASTM Standard E1226-88.
- GLP compliance:
- no
Test material
- Reference substance name:
- 5,5'-dithiodi-1,3,4-thiadiazole-2(3H)-thione
- EC Number:
- 276-763-0
- EC Name:
- 5,5'-dithiodi-1,3,4-thiadiazole-2(3H)-thione
- Cas Number:
- 72676-55-2
- Molecular formula:
- C4-H2-N4-S6
- IUPAC Name:
- 5,5'-dithiodi-1,3,4-thiadiazole-2(3H)-thione
- Test material form:
- solid: particulate/powder
- Remarks:
- migrated information: powder
Constituent 1
Results and discussion
- Results:
- Max explosion pressure (bar): 9.4
Max rate of pressure rise (bar/s): 1183
Kst value (bar.m/s): 321
Any other information on results incl. tables
During testing of powders in the 201 sphere test to BS6713 and ISO6184/1 1985 approximately seven different concentrations are tested. The mean values are given for each of the concentrations tested. The final quoted valued for pressure, rate of pressure rise and concentration are calculated from the mean of the maximum values during test series 1, 2, &3 in accordance with the 201 sphere test protocol.
Maximum values are not quoted. The average result over the three series is given. This is because slight variations in turbulence or chemical ignitor energy may marginally effect the results.
The standard test does not provide the maximum rate of pressure rise; a decrease in ignition delay will give higher maximum rate of pressure rise data. The turbulence level is selected to correlate with data from l arge (industrial scale) vessels. The cube root Law on which the 201 sphere test is based, assumes that on plant scale, the dust suspension is quiescent (i.e., negligible turbulence).
Applicant's summary and conclusion
- Conclusions:
- The Kst (bar.m/s) value is 321.
- Executive summary:
The Kst (bar.m/s) value is 321. According to the relationship between the Kst value and the physical severity of dust explosion a value greater than 300 indicates very strong explosion.
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