Chromium Cr structure

Flashcard maker : Lily Taylor

Cr structure
Molecular Formula Cr
Average mass 51.996 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 Melting Point:

      1900 °C Oxford University Chemical Safety Data (No longer updated) More details
    • Experimental Boiling Point:

      4788 F (2642.2222 °C)
      NIOSH GB4200000
      2640 °C Oxford University Chemical Safety Data (No longer updated) More details
    • Experimental Vapor Pressure:

      0 mmHg (Approximate) NIOSH GB4200000
    • Experimental Solubility:

      Insoluble NIOSH GB4200000
  • Miscellaneous
    • Appearance:

      Blue-white to steel-gray, lustrous, brittle, hard, odorless solid. NIOSH GB4200000
      very hard silvery grey metal Oxford University Chemical Safety Data (No longer updated) More details
    • Stability:

      Stable. Incompatible with carbonates, strong bases,mineral acids, lithium, sulfur dioxide, strong acids. Oxford University Chemical Safety Data (No longer updated) More details
    • Safety:

      11/1/1940 12:00:00 AM Alfa Aesar 10147, 10148, 10149, 10150, 10151, 10452, 10453, 13796, 13864, 14222, 14408, 14760, 35668, 38494, 38722, 38728, 40842, 40843, 40844, 40845, 41797, 42310
      22-36/37 Alfa Aesar 10147, 10148, 10149, 10150, 10151, 10452, 10453
      23-26-36/37/39-45 Alfa Aesar 00472, 13796, 13864, 14222, 14408, 14760, 35668, 38494, 38722, 38728, 88059
      23-26-36/37/39-45-60 Alfa Aesar 35668, 38494, 38722, 38728
      23-36/37 Alfa Aesar 13796, 13864, 14222, 14408, 14760
      34 Alfa Aesar 00472, 13796, 13864, 14222, 14408, 14760, 35668, 38494, 38722, 38728, 88059
      36/37 Alfa Aesar 10147, 10148, 10149, 10150, 10151, 10452, 10453, 13796, 13864, 14222, 14408, 14760, 35668, 38494, 38722, 38728, 40842, 40843, 40844, 40845, 41797, 42310
      40 Alfa Aesar 10147, 10148, 10149, 10150, 10151, 10452, 10453, 13796, 13864, 14222, 14408, 14760
      45 Alfa Aesar 42438, 42926, 43066, 44005
      53-20-23-36/39-45 Alfa Aesar 42438, 42926, 43066, 44005
      Avoid exposure to dust. Oxford University Chemical Safety Data (No longer updated) More details
      DANGER: CORROSIVE, cancer risk, causes burns Alfa Aesar 13864, 14408, 38722, 38728
      DANGER: FLAMMABLE, cancer risk, irritates skin, eyes, lungs Alfa Aesar 41797
      DANGER: POISON, causes CNS injury Alfa Aesar 10452
      Not known to be hazardous in this form Alfa Aesar 00472, 10149, 10150, 10151, 10452, 10453, 14760, 38494, 40842, 40843, 40844, 40845, 42310, 42926, 43066, 44005
      WARNING: CORROSIVE, irritates skin and eyes Alfa Aesar 13864, 14408, 38722, 38728, 88059
      WARNING: Inhalation of fumes or dust may be a cancer hazard Alfa Aesar 00472, 10147, 10148, 10149, 10150, 10151, 10453, 13796, 14222, 14760, 35668, 38494, 40842, 40843, 40844, 40845, 41797, 42310, 42438, 42926, 44005
      WARNING: Irreversible damage risk, protect skin/eyes/lungs. Alfa Aesar 10147, 10148, 13796, 35668
      WARNING: Irritates lungs, eyes, skin Alfa Aesar 14222, 42438
    • First-Aid:

      Eye: Irrigate immediately Skin: Soap wash Breathing: Respiratory support Swallow: Medical attention immediately NIOSH GB4200000
    • Exposure Routes:

      inhalation, ingestion, skin and/or eye contact NIOSH GB4200000
    • Symptoms:

      Irritation eyes, skin; lung fibrosis (histologic) NIOSH GB4200000
    • Target Organs:

      Eyes, skin, respiratory system NIOSH GB4200000
    • Incompatibility:

      Strong oxidizers (such as hydrogen peroxide), alkalis NIOSH GB4200000
    • Personal Protection:

      Skin: No recommendation Eyes: No recommendation Wash skin: No recommendation Remove: No recommendation Change: No recommendation NIOSH GB4200000
    • Exposure Limits:

      NIOSH REL : TWA 0.5 mg/m 3 See Appendix C OSHA PEL*: TWA 1 mg/m 3 See Appendix C [*Note: The PEL also applies to insoluble chromium salts.] NIOSH GB4200000

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): 0 (Modified Grain method)
 MP (exp database): 1900 deg C
 BP (exp database): 2642 deg C
 Subcooled liquid VP: 0 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): 8.667e+004
 log Kow used: 0.23 (estimated)
 no-melting pt equation used

 Water Sol Estimate from Fragments:
 Wat Sol (v1.01 est) = 92297 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]: not available

 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) : 0.7228
 Biowin2 (Non-Linear Model) : 0.9064
 Expert Survey Biodegradation Results:
 Biowin3 (Ultimate Survey Model): 3.0843 (weeks )
 Biowin4 (Primary Survey Model) : 3.7727 (days )
 MITI Biodegradation Probability:
 Biowin5 (MITI Linear Model) : 0.5575
 Biowin6 (MITI Non-Linear Model): 0.7359
 Anaerobic Biodegradation Probability:
 Biowin7 (Anaerobic Linear Model): 0.8361
 Ready Biodegradability Prediction: YES

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

 Sorption to aerosols (25 Dec C)[AEROWIN v1.00]:
 Vapor pressure (liquid/subcooled): -99 Pa (0 mm Hg)
 Log Koa (Koawin est ): 0.229
 Kp (particle/gas partition coef. (m3/ug)):
 Mackay model : not available
 Octanol/air (Koa) model: 4.16E-013 
 Fraction sorbed to airborne particulates (phi):
 Junge-Pankow model : not available
 Mackay model : not available
 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): 3.33E-011 (Koa method)
 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: 0.7531 hours (45.18 min)
 Half-Life from Model Lake : 68.68 hours (2.862 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 38.1 1e+005 1000 
 Water 55.6 360 1000 
 Soil 6.22 720 1000 
 Sediment 0.103 3.24e+003 0 
 Persistence Time: 182 hr




 

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