Fate, weathering, behaviour and toxicity of priority Hazardous and Noxious Substances

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On this database it is collected information on fate, weathering, behaviour and toxicity of priority Hazardous and Noxious Substances (HNS) from different sources. This systematized information is a useful tool to predict the behaviour of priority HNS in accidental spills, backing spill preparedness and effective decision-making process. This database also provides an important support to environmental and human health risk assessment, and monitoring actions.

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Name: Heptane

CAS Number: 142-82-5

UN Number: 1206

Formulae: C7H16

Name: Heptane

CAS Number: 142-82-5

UN Number: 1206

Formulae: C7H16

Physicochemical properties/Characteristics

E

Physical behaviour (GESAMP, 2016)

1, 2

100.205

Molecular Weight
(g/mol)

2

0.68

Density
(kg/L)

2

6.13

Vapour pressure
(KPa; 25ºC)

2

3.40

Water solubility
(mg/L; 25ºC)

2

0.38

Dynamic viscosity
(mPa.s; 26.5ºC)

2, 3

-90.6

Melting point (ºC)

2

98.5

Boiling point (ºC)

2

26.8

Volatilization half-life (days)

4
  1. G: gas; D: dissolver; E: evaporator; F: floater; S: sinker; GD: gas/dissolver; DE: dissolver/evaporator; FD: floater/dissolver; FE: floater/evaporator; FED: floater/evaporator/dissolver; Fp: persistent floater; SD: sinker/dissolver
  2. Values collected from the literature and public databases e.g. PubChem
  3. “-“ corresponds to values not found
  4. Values estimated with models of the EPI suiteTM

Fugacity/Persistence

7.78

Air

4, 5

91.40

Water

4, 5

0.00

Soil

4, 5

0.80

Sediment

4, 5

6.7

Persistence (days)

4
  1. Values estimated with models of the EPI suiteTM
  2. In the present study, only emissions in water were considered

Physicochemical degradation/Biodegradation

18.7

Atmosferic Oxidation (hours)

4

R

Biodegradation rate (GESAMP, 2016)

6, 7

0.86

Aerobic biodegradation probability

4

3.97 days

Primary aerobic biodegradation half-life

4, 8

3.28 days-weeks

Ultimate aerobic biodegradation half-life

4, 8

5.5

Hydrocarbon Biodegradation half-life (days)

3, 4

0.49

Anaerobic Biodegradation probability

4
  1. “-“ corresponds to values not found
  2. Values estimated with models of the EPI suiteTM
  3. Results obtained from the literature
  4. GESAMP criteria consider substances to be “readily biodegradable” (R) if, in 28-day biodegradation studies, the following levels of degradation are achieved: in tests based upon dissolved organic carbon (DOC) die-away: ≥ 70%; or in tests based upon oxygen depletion or carbon dioxide generation: ≥ 60% of the theoretical maxima; or where only chemical oxygen demand (COD) and biochemical oxygen demand (BOD5) data are available, the ratio of BOD5/COD ≥ 0.5; or where other convincing scientific evidence is available to demonstrate that the substance can be degraded (biotically and/or abiotically) in the aquatic environment to a level of > 70% within a 28-day period. Otherwise they are “not readily biodegradable” (NR) (GESAMP, 2014).
  5. See Table 1 in the supplementary material for more information on the rating reported by Boethling et al. (1994)

Bioaccumulation/Biotransformation

1.92

Biotransformation half-life (days)

2

4.66

Partition coefficient (log Kow)

2

681.8

Bioconcentration factor (BFC)

4

4

Bioaccumulation rate (GESAMP, 2016)

9

3.21

Adsorption coefficient (log koc)

2
  1. Values collected from the literature and public databases e.g. PubChem
  2. Values estimated with models of the EPI suiteTM
  3. See Table 2 in the supplementary material for more information on Bioaccumulation rate classification (GESAMP, 2014)

Aquatic Toxicity

4

Acute toxicity (GESAMP, 2016)

10

-

Chronic toxicity (GESAMP, 2016)

3, 10
  1. “-“ corresponds to values not found
  2. See Table 3 in the supplementary material for more information on Aquatic Toxicity classification (GESAMP, 2014)

Acute Mammals/Human health effects

0

Oral Toxicity (GESAMP, 2016)

11

0

Dermal toxicity (GESAMP, 2016)

11

0

Inhalation toxicity (GESAMP, 2016)

11

1

Skin irritation & corrosion (GESAMP, 2016)

11

1

Eye irritation & corrosion (GESAMP, 2016)

11

0

Toxicity

12

0

Severity

12
  1. See Table 4 in the supplementary material for more information on Human health (Toxic effects to mammals) classification (GESAMP, 2014)
  2. For more information on Toxicity and Severity scores consult Harold et al. (2014)

Chronic Human/Mammals health effects

-

Carcinogenicity (IARC)

3, 13

No

Mutagenicity (GESAMP, 2016)

11

No

Reprotoxicity (GESAMP, 2016)

11

No

Sensitizing to skin (GESAMP, 2016)

11

Yes

Aspiration hazard (GESAMP, 2016)

11

No

Target Organ Toxicity (GESAMP, 2016)

11

No

Sensitizing to respiratory system (GESAMP, 2016)

11

No

Neurotoxicity (GESAMP, 2016)

11

No

Immunotoxicity (GESAMP, 2016)

11
  1. “-“ corresponds to values not found
  2. See Table 4 in the supplementary material for more information on Human health (Toxic effects to mammals) classification (GESAMP, 2014)
  3. See Table 5 in the supplementary material for more information on IARC classification

Toxicity tests results
PNECseawater: 0.01 µg/L
PNECwater, intermittent: 1 µg/L

Algae

EC50

Parameter

1

0.502

Concentration
(mg/L)

Green algae

Species

-

Endpoint

Freshwater; 96h-exposure

Observations

1
  1. Values predicted with ECOSAR V1.11 (EPA) (accessed February 6, 2017)

Invertebrates

EC50

Parameter

1

472

Concentration
(mg/L)

Snail - Viviparus bengalensis

Species

Intoxication; immobilization

Endpoint

Freshwater; Static; 28 ºC; 96h-exposure

Observations

2

EC50

Parameter

1

82.5

Concentration
(mg/L)

Water flea - Daphnia magna

Species

Intoxication; immobilization

Endpoint

Freshwater; Static; 28 ºC; 96h-exposure

Observations

3

EC50

Parameter

2

1.5

Concentration
(mg/L)

Dapnhids

Species

Immobilization

Endpoint

Freshwater; 48h-exposure

Observations

4

LC50

Parameter

3

0.2

Concentration
(mg/L)

Amphipod - Chaetogammarus marinus

Species

Mortality

Endpoint

Saltwater; 96h-exposure

Observations

5

LC50

Parameter

3

0.1

Concentration
(mg/L)

Opossum shrimp - Mysidopsis bahia

Species

Mortality

Endpoint

Saltwater; 96h-exposure

Observations

6 Lowest
  1. Das PKMK, Konar SK; Environ Ecol 6 (4): 885-891 (1988) as cited in the ECOTOX database. Available at: http://cfpub.epa.gov/ecotox/quick_query.htm (accessed February 7, 2017)
  2. SIDS initial assessment profile - C7-C9 Aliphatic Hydrocarbon Solvents Category. SIAM (2010). Available at http://webnet.oecd.org/Hpv/UI/handler.axd?id=afd8ccb9-af39-43ca-b49c-5034972e75dc (accessed January 30, 2017)
  3. Verschueren K; Handbook of Environmental Data on Organic Chemicals. Volumes 1-2. 4th ed. John Wiley & Sons, New York, NY. (2001)

Fish

LC50

Parameter

1

4

Concentration
(mg/L)

Goldfish - Carassius auratus

Species

Mortality

Endpoint

Freshwater; 24h-exposure

Observations

7

LC50

Parameter

2

2940

Concentration
(mg/L)

Carp - Leuciscus idus ssp. melanotus

Species

Mortality

Endpoint

Freshwater; 48h-exposure

Observations

8

LC50

Parameter

3

4924

Concentration
(mg/L)

Western mosquitofish - Gambusia affinis

Species

Mortality

Endpoint

Freshwater; Static; 20-27 ºC; 24, 48 and 96h-exposure; Adult(s)

Observations

9

LC50

Parameter

4

375

Concentration
(mg/L)

Mozambique tilapia - Oreochromis mossambicus

Species

Mortality

Endpoint

Freshwater; Static; 27.8 ºC; 96h-exposure

Observations

10

LC50

Parameter

5

0.336

Concentration
(mg/L)

Fish

Species

Mortality

Endpoint

Freshwater; 96h-exposure

Observations

11

LC50

Parameter

5

0.430

Concentration
(mg/L)

Fish

Species

Mortality

Endpoint

Saltwater; 96h-exposure

Observations

12
  1. Verschueren K; Handbook of Environmental Data on Organic Chemicals. Volumes 1-2. 4th ed. John Wiley & Sons, New York, NY. (2001)
  2. Juhnke I, Luedemann D; Z.Wasser-Abwasser-Forsch 11 (5): 161-164 (1978) as cited in the ECOTOX database. Available at: http://cfpub.epa.gov/ecotox/quick_query.htm (accessed February 7, 2017)
  3. Wallen IE et al; Sewage Ind Wastes 29 (6): 695-711 (1957) as cited in the ECOTOX database. Available at: http://cfpub.epa.gov/ecotox/quick_query.htm (accessed February 7, 2017)
  4. Ghatak DB et al; Environ Ecol 6 (4): 943-947 (1988) as cited in the ECOTOX database. Available at: http://cfpub.epa.gov/ecotox/quick_query.htm (accessed February 7, 2017)
  5. Values predicted with ECOSAR V1.11 (EPA) (accessed February 6, 2017)

Mammals

LC50

Parameter

1

0.103

Concentration
(ppm)

Rat

Species

Mortality

Endpoint

Acute; 4h-inhalation

Observations

13

LD50

Parameter

1

75

Concentration
(ppm)

Mouse

Species

Mortality

Endpoint

Acute; 2h-inhalation

Observations

14

LD50

Parameter

1

222

Concentration
(mg/kg)

Mouse

Species

Mortality

Endpoint

Acute; intravenous

Observations

15
  1. Lewis RJ Sr; Sax's Dangerous Properties of Industrial Materials. 11th ed. Wiley-Interscience, Wiley & Sons, Inc., Hoboken, NJ. (2004)
References

Boethling RS, Howard PH, Meylan W, Stiteler W, Beauman J, Tirado N. 1994. Group contribution method for predicting probability and rate of aerobic biodegradation. Environ. Sci. Technol. 28: 459-465.

Bonn Agreement, 1994. European Classification System, Bonn Agreement: Counter-Pollution Manual. Bonn Agreement, London (Chapter 25).

GESAMP (IMO/FAO/UNESCO-IOC/WMO/WHO/IAEA/UN/UNEP Joint Group of Experts on the Scientific Aspects of Marine Environmental Protection), 2014. Revised GESAMP Hazard Evaluation Procedure for Chemical Substances Carried by Ships, 2nd edition. Rep. Stud. GESAMP No. 64, 126 pp.

GESAMP Composite List, 2016. ANNEX 5 – UPDATED GESAMP COMPOSITE LIST. Available at: https://edocs.imo.org/Final Documents/English/PPR 1-CIRC.3 (E).docx (Accessed: December 12, 2016).

Harold PD, Souza AS, Louchart P, Russell D, Brunt H, 2014. Development of a risk based prioritisation methodology to inform public health emergency planning and preparedness in case of accidental spill at sea of hazardous and noxious substances (HNS). Environ. Int. 72: 157-163.