Hafnium Hf structure – Flashcards

Flashcard maker : Sabrina Peterson

Hf structure
Molecular Formula Hf
Average mass 178.490 Da
Density
Boiling Point
Flash Point
Molar Refractivity
Polarizability
Surface Tension
Molar Volume
  • Experimental data
  • Predicted – ACD/Labs
  • Predicted – EPISuite
  • Predicted – ChemAxon
  • Experimental Physico-chemical Properties
    • Experimental Boiling Point:

      8316 F (4602.2222 °C)
      NIOSH MG4600000
    • Experimental Vapor Pressure:

      0 mmHg (Approximate) NIOSH MG4600000
    • Experimental Solubility:

      Insoluble NIOSH MG4600000
  • Miscellaneous
    • Appearance:

      Highly lustrous, ductile, grayish solid. NIOSH MG4600000
      solid Oxford University Chemical Safety Data (No longer updated) More details
    • Stability:

      Stable. Incompatible with oxygen, sulfur, strong oxidizing agents, halogens, phosphorus, strong acids.Highly flammable. Oxford University Chemical Safety Data (No longer updated) More details
    • Safety:

      17 Alfa Aesar 10200, 10201, 10202, 10204, 10205, 10793, 10794
      23-26-36/37/39-45 Alfa Aesar 00524, 00674, 13843, 14374, 88069
      33 Alfa Aesar 10200, 10201, 10202, 10204, 10205, 10793, 10794
      34 Alfa Aesar 00524, 00674, 13843, 14374, 88069
      DANGER: Causes CNS injury Alfa Aesar 10204
      DANGER: FLAMMABLE, irritates skin and eyes Alfa Aesar 00674, 10201, 10202
      DANGER: FLAMMABLE, WATER REACTIVE, irritates skin & eyes. Alfa Aesar 10201, 10202
      Not known to be hazardous in this form Alfa Aesar 00524, 10200, 10205, 10793, 10794, 13305, 13435, 39683, 39710, 42982
      Safety glasses. If working with powder, use good ventilation and do not inhale dust.Note that the powdered form of this material is very flammable. Oxford University Chemical Safety Data (No longer updated) More details
      WARNING: CORROSIVE, burns skin and eyes Alfa Aesar 13843, 14374
      WARNING: CORROSIVE, irritates skin and eyes Alfa Aesar 13843, 14374, 88069
    • First-Aid:

      Eye: Irrigate immediately Skin: Soap wash promptly Breathing: Respiratory support Swallow: Medical attention immediately NIOSH MG4600000
    • Exposure Routes:

      inhalation, ingestion, skin and/or eye contact NIOSH MG4600000
    • Symptoms:

      In animals: irritation eyes, skin, mucous membrane; liver damage NIOSH MG4600000
    • Target Organs:

      Eyes, skin, mucous membrane, liver NIOSH MG4600000
    • Incompatibility:

      Strong oxidizers, chlorine NIOSH MG4600000
    • Personal Protection:

      Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated/Daily Remove: When wet or contaminated Change: Daily Provide: Eyewash, Quick drench NIOSH MG4600000
    • Exposure Limits:

      NIOSH REL*: TWA 0.5 mg/m 3 [*Note: The REL also applies to other hafnium compounds (as Hf).] OSHA PEL*: TWA 0.5 mg/m 3 [*Note: The PEL also applies to other hafnium compounds (as Hf).] NIOSH MG4600000

Predicted data is generated using the ACD/Labs Percepta Platform – PhysChem Module

Density:
Boiling Point:
Vapour Pressure:
Enthalpy of Vaporization:
Flash Point:
Index of Refraction:
Molar Refractivity:
#H bond acceptors: 0
#H bond donors: 0
#Freely Rotating Bonds: 0
#Rule of 5 Violations:
ACD/LogP:
ACD/LogD (pH 5.5):
ACD/BCF (pH 5.5):
ACD/KOC (pH 5.5):
ACD/LogD (pH 7.4):
ACD/BCF (pH 7.4):
ACD/KOC (pH 7.4):
Polar Surface Area: 0 Å2
Polarizability:
Surface Tension:
Molar Volume:

Predicted data is generated using the US Environmental Protection Agency’s EPISuite™

 
 Log Octanol-Water Partition Coef (SRC):
 Log Kow (KOWWIN v1.67 estimate) = 0.23

 Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42):
 Boiling Pt (deg C): 482.98 (Adapted Stein & Brown method)
 Melting Pt (deg C): 188.60 (Mean or Weighted MP)
 VP(mm Hg,25 deg C): 4.24E-009 (Modified Grain method)
 Subcooled liquid VP: 2.19E-007 mm Hg (25 deg C, Mod-Grain method)

 Water Solubility Estimate from Log Kow (WSKOW v1.41):
 Water Solubility at 25 deg C (mg/L): 3.57e+004
 log Kow used: 0.23 (estimated)
 no-melting pt equation used

 Water Sol Estimate from Fragments:
 Wat Sol (v1.01 est) = 3.1683e+005 mg/L

 ECOSAR Class Program (ECOSAR v0.99h):
 Class(es) found:
 Neutral Organics

 Henrys Law Constant (25 deg C) [HENRYWIN v3.10]:
 Bond Method : 2.45E-002 atm-m3/mole
 Group Method: Incomplete
 Henrys LC [VP/WSol estimate using EPI values]: 2.789E-014 atm-m3/mole

 Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
 Log Kow used: 0.23 (KowWin est)
 Log Kaw used: 0.001 (HenryWin est)
 Log Koa (KOAWIN v1.10 estimate): 0.229
 Log Koa (experimental database): None

 Probability of Rapid Biodegradation (BIOWIN v4.10):
 Biowin1 (Linear Model) : 0.6626
 Biowin2 (Non-Linear Model) : 0.6164
 Expert Survey Biodegradation Results:
 Biowin3 (Ultimate Survey Model): 2.8047 (weeks )
 Biowin4 (Primary Survey Model) : 3.5902 (days-weeks )
 MITI Biodegradation Probability:
 Biowin5 (MITI Linear Model) : 0.1811
 Biowin6 (MITI Non-Linear Model): 0.0674
 Anaerobic Biodegradation Probability:
 Biowin7 (Anaerobic Linear Model): 0.8361
 Ready Biodegradability Prediction: NO

Hydrocarbon Biodegradation (BioHCwin v1.01):
 Structure incompatible with current estimation method!

 Sorption to aerosols (25 Dec C)[AEROWIN v1.00]:
 Vapor pressure (liquid/subcooled): 2.92E-005 Pa (2.19E-007 mm Hg)
 Log Koa (Koawin est ): 0.229
 Kp (particle/gas partition coef. (m3/ug)):
 Mackay model : 0.103 
 Octanol/air (Koa) model: 4.16E-013 
 Fraction sorbed to airborne particulates (phi):
 Junge-Pankow model : 0.788 
 Mackay model : 0.892 
 Octanol/air (Koa) model: 3.33E-011 

 Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
 Hydroxyl Radicals Reaction:
 OVERALL OH Rate Constant = 0.0000 E-12 cm3/molecule-sec
 Half-Life = -------
 Ozone Reaction:
 No Ozone Reaction Estimation
 Fraction sorbed to airborne particulates (phi): 0.84 (Junge,Mackay)
 Note: the sorbed fraction may be resistant to atmospheric oxidation

 Soil Adsorption Coefficient (PCKOCWIN v1.66):
 Koc : 14.3
 Log Koc: 1.155 

 Aqueous Base/Acid-Catalyzed Hydrolysis (25 deg C) [HYDROWIN v1.67]:
 Rate constants can NOT be estimated for this structure!

 Bioaccumulation Estimates from Log Kow (BCFWIN v2.17):
 Log BCF from regression-based method = 0.500 (BCF = 3.162)
 log Kow used: 0.23 (estimated)

 Volatilization from Water:
 Henry LC: 0.0245 atm-m3/mole (estimated by Bond SAR Method)
 Half-Life from Model River: 1.395 hours
 Half-Life from Model Lake : 127.2 hours (5.302 days)

 Removal In Wastewater Treatment:
 Total removal: 90.51 percent
 Total biodegradation: 0.02 percent
 Total sludge adsorption: 0.40 percent
 Total to Air: 90.09 percent
 (using 10000 hr Bio P,A,S)

 Level III Fugacity Model:
 Mass Amount Half-Life Emissions
 (percent) (hr) (kg/hr)
 Air 40.2 1e+005 1000 
 Water 54.1 360 1000 
 Soil 5.63 720 1000 
 Sediment 0.101 3.24e+003 0 
 Persistence Time: 177 hr




 

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