Chromium trioxide CrO3 structure – Flashcards

Flashcard maker : Alice Rees

CrO3 structure
Molecular Formula CrO3
Average mass 99.994 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:

      197 °C Oxford University Chemical Safety Data (No longer updated) More details
      196 °C Oakwood 094433
    • Experimental Boiling Point:

      482 F (250 °C)
      (Decomposes) NIOSH GB6650000 (CrO3)
      250 °C (Decomposes) Oxford University Chemical Safety Data (No longer updated) More details
    • Experimental Gravity:

      2.7 g/mL Oakwood 094433
    • Experimental Solubility:

      63% NIOSH GB6650000 (CrO3)
      Soluble in water, H2SO4, and alcohol Alfa Aesar 36468
  • Miscellaneous
    • Appearance:

      CrO3: Dark-red, odorless flakes or powder. [Note: Often used in an aqueous solution (H2CrO4).] NIOSH GB6650000 (CrO3)
      dark red crystals or powder Oxford University Chemical Safety Data (No longer updated) More details
    • Stability:

      Stable. Strong oxidizer. Reacts with most organic material in aviolent and often explosive fashion. Moisture sensitive. Oxford University Chemical Safety Data (No longer updated) More details
    • Toxicity:

      ORL-RAT LD50 80 mg kg-1, IPR-MUS LD50 29 mg kg-1 Oxford University Chemical Safety Data (No longer updated) More details
    • Safety:

      DANGER: Cancer risk, burns skin, eyes, nose, throat & lungs Alfa Aesar 10691, 12522, 36468
      Safety glasses, gloves, good ventilation is essential.Treat as a carcinogen. Oxford University Chemical Safety Data (No longer updated) More details
    • First-Aid:

      Eye: Irrigate immediately Skin: Soap flush immediately Breathing: Respiratory support Swallow: Medical attention immediately NIOSH GB6650000 (CrO3)
    • Exposure Routes:

      inhalation, ingestion, skin and/or eye contact NIOSH GB6650000 (CrO3)
    • Symptoms:

      Irritation respiratory system; nasal septum perforation; liver, kidney damage; leukocytosis (increased blood leukocytes), leukopenia (reduced blood leukocytes), eosinophilia; eye injury, conjunctiviti
      s; skin ulcer, sensitization dermatitis; [potential occupational carcinogen] NIOSH GB6650000 (CrO3)
    • Target Organs:

      Blood, respiratory system, liver, kidneys, eyes, skin Cancer Site [lung cancer] NIOSH GB6650000 (CrO3)
    • Incompatibility:

      Combustible, organic, or other readily oxidizable materials (paper, wood, sulfur, aluminum, plastics, etc.); corrosive to metals NIOSH GB6650000 (CrO3)
    • Personal Protection:

      Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated Change: Daily Provide: Eyewash, Quick drench NIOSH GB6650000 (CrO3)
    • Exposure Limits:

      NIOSH REL (as Cr): Ca TWA 0.001 mg/m 3 See Appendix A See Appendix C OSHA PEL (as CrO 3 ): TWA 0.005 mg/m 3 SeeAppendix C NIOSH GB6650000 (CrO3)

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: 3
#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: 51 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) = 2.23

 Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42):
 Boiling Pt (deg C): 564.42 (Adapted Stein & Brown method)
 Melting Pt (deg C): 242.69 (Mean or Weighted MP)
 VP(mm Hg,25 deg C): 1.01E-011 (Modified Grain method)
 Subcooled liquid VP: 2.3E-009 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): 1460
 log Kow used: 2.23 (estimated)
 no-melting pt equation used

 Water Sol Estimate from Fragments:
 Wat Sol (v1.01 est) = 1.775e+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 : Incomplete
 Group Method: Incomplete
 Henrys LC [VP/WSol estimate using EPI values]: 9.101E-016 atm-m3/mole

 Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
 Can Not Estimate (can not calculate HenryLC)

 Probability of Rapid Biodegradation (BIOWIN v4.10):
 Biowin1 (Linear Model) : 0.6999
 Biowin2 (Non-Linear Model) : 0.8304
 Expert Survey Biodegradation Results:
 Biowin3 (Ultimate Survey Model): 2.9782 (weeks )
 Biowin4 (Primary Survey Model) : 3.7035 (days-weeks )
 MITI Biodegradation Probability:
 Biowin5 (MITI Linear Model) : 0.4147
 Biowin6 (MITI Non-Linear Model): 0.4107
 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): 3.07E-007 Pa (2.3E-009 mm Hg)
 Log Koa (): not available
 Kp (particle/gas partition coef. (m3/ug)):
 Mackay model : 9.78 
 Octanol/air (Koa) model: not available
 Fraction sorbed to airborne particulates (phi):
 Junge-Pankow model : 0.997 
 Mackay model : 0.999 
 Octanol/air (Koa) model: not available

 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): 0.998 (Junge,Mackay)
 Note: the sorbed fraction may be resistant to atmospheric oxidation

 Soil Adsorption Coefficient (PCKOCWIN v1.66):
 Koc : 35.04
 Log Koc: 1.545 

 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 = 1.016 (BCF = 10.38)
 log Kow used: 2.23 (estimated)

 Volatilization from Water:
 Henry LC: 9.1E-016 atm-m3/mole (calculated from VP/WS)
 Half-Life from Model River: 6.433E+011 hours (2.68E+010 days)
 Half-Life from Model Lake : 7.017E+012 hours (2.924E+011 days)

 Removal In Wastewater Treatment:
 Total removal: 2.52 percent
 Total biodegradation: 0.10 percent
 Total sludge adsorption: 2.42 percent
 Total to Air: 0.00 percent
 (using 10000 hr Bio P,A,S)

 Level III Fugacity Model:
 Mass Amount Half-Life Emissions
 (percent) (hr) (kg/hr)
 Air 1.06e-005 1e+005 1000 
 Water 20.5 360 1000 
 Soil 79.4 720 1000 
 Sediment 0.096 3.24e+003 0 
 Persistence Time: 733 hr




 

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