Testing Information

Testing Status of Agents at NTP

CAS Registry Number: 7440-50-8 (Copper)

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http://ntp.niehs.nih.gov/go/23556

Selected information from two of the National Library of Medicine's databases: ChemIDPlus1 and HSDB2.

Structure

Chemical Structure for CAS Registry Number 7440-50-8 from NLM

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Chemical Properties2

Property Description
Color/Form
  • Reddish, lustrous, ductile, malleable metal
  • Red metal; cubic
Odor
  • Odorless /Copper dusts and mists/
Taste
  • None found
Boiling Point
  • 2595 deg C
Melting Point
  • 1083 deg C
Molecular Weight
  • 63.546
Corrosivity
  • None found
Critical Temperature & Pressure
  • None found
Density/Specific Gravity
  • 8.94
Disassociation Constants
  • None found
Heat of Combustion
  • None found
Heat of Vaporization
  • 1150 cal/g
log P (octanol-water)
  • None found
pH
  • None found
Solubilities
  • Slightly sol in dilute acid
  • Slowly soluble in ammonia water
Spectral Properties
  • None found
Surface Tension
  • None found
Vapor Density
  • None found
Vapor Pressure
  • 1 mm Hg @ 1628 deg C
Relative Evaporation Rate
  • None found
Viscosity
  • None found
Other Properties
  • Lustrous, ductile, malleable metal; Mohs' hardness: 3.0; specific resistance: 1.673 microohm/cm; heat of fusion: 48.9 cal/g; heat capacity (solid): 0.092 cal/g/deg C at 20 deg C, (liq): 0.112 cal/g/deg C; becomes dull when exposed to air; two naturally occurring isotopes: 63 (69.09%), 65 (30.91%); 9 artificial isotopes
  • Very slowly attacked by cold hydrochloric acid or dil sulfuric acid; readily by dil nitric acid, and by both not conch sulfuric acid and hydrobromic acid. It is also attacked by acetic acid and other organic acids.
  • COPPER FORMS TWO SERIES OF SALTS, CU(1+) AND CU(2+) BOTH VALENCE TYPES FORM COMPLEX IONS THAT ARE STABLE.
  • Ductile, excellent conductor of electricity. Complexing agent, coordination numbers 2 and 4. More resistant to atmospheric corrosion than iron, forming green layer of hydrated basic carbonate. Readily attacked by alkalies. Noncombustible, except as powder.
  • ELECTRONEGATIVITY (PAULING SCALE): 1.90
  • Dissolved readily in nitric acid and hot concentrated sulfuric acids slowly, but only when exposed to the atmosphere.

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Uses2

  • For Copper (USEPA/OPP Pesticide Code: 022501) ACTIVE products with label matches. /SRP: Registered for use in the U.S. but approved pesticide uses may change periodically and so federal, state and local authorities must be consulted for currently approved uses./
  • Electrical wiring; switches; plumbing; heating; roofing and building construction; chemical and pharmaceutical machinery; alloys (brass, bronze, Monel metal, beryllium-copper); electroplated protective coatings and undercoats for nickel, chromium, zinc, etc., cooking utensils; corrosion-resistant piping; insecticides; catalysts; antifouling paints. Flakes used as insulation for liquid fuels. Whiskers used in thermal and electrical composites.
  • In works of art; manufacture of bronzes, brass, other copper alloys, electrical conductors, ammunition, copper salts
  • In a statistical analyses of the copper, brass and bronze industry, there are five primary markets: (1) building construction (41%), including building wiring, plumbing, and heating; air conditioning (qv) and commercial refrigeration; builders' hardware, and architectural materials; (2) electrical and electronic products (23%), for example power utilities, telecommunications, business electronics and lighting and wiring devices; (3) industrial machinery and equipment, (14%) such as in-plant equipment, industrial valves and fittings, nonelectrical instruments, off-highway vehicles, and heat exchangers; (4) transportation equipment (12%), including automobiles, trucks and buses, railroads, marine vehicles, aircraft, and aerospace vehicles; and consumer and general products (10%), such as appliances, cord sets, ordnance, consumer electronics, fasteners, coinage, utensils and cutlery, and miscellaneous items.
  • Conductor material; wire; rods; current generation, transmission, and conduction; cables; generators; motors; transformers; electrical appliances; vessels; pipes; installation; wall lining; roofing; art objects; coins; metals; military hardware and ammunition.
  • Nickel-silver alloys; copper-cadmium alloys(electrical conductors); copper-chromium alloys; copper-manganese-aluminum alloys(resistance wire, heating wire); copper-nickel alloys (chemical equipment); electrical conductors/components (wire, motors, generators, switchgear); beryllium- collor alloys(electrical contact, springs, dies, bellows, welding disks); aluminum bronze ingredient (ship propellers, fittings, automobile engine components, plastic molding dies); bronze ingredient (bearings); manganese bronze ingredient; phosphor bronze ingredient (bearings); reagent (Ullmann reactions); water piping.
  • Petroleum isomerization/cracking catalyst; glass/ceramics ingredient; fireworks/flares ingredient; mordant (textile dyeing); photographic fixer ingredient; wet mercury production process reagent; copper plating reagent (precious metal refining)
  • METAL FOR ELECTRICAL & ELECTRONIC PRODUCTS (EG, WIRE) BUILDING CONSTRUCTION (EG, PLUMBING PIPES), INDUSTRIAL MACHINERY & EQUIPMENT, TRANSPORTATION INDUSTRY (EG, AUTOMOBILES), CONSUMER & GENERAL PRODUCTS (EG, COINS), & IN INORGANIC PIGMENTS (EG, PIGMENT METAL 2); CHEM INTERMEDIATE FOR COPPER CHEMS (EG, CUPRIC SULFATE). **PEER REVIEWED**
  • MEDICATION **PEER REVIEWED**
  • Soil fertilization with copper has been used in Australia & New Zealand but was ineffective in a high molybdenum area in Nevada in reducing molybdenum or increasing copper content of feeds. Treatment of pasture or crops with copper has not been extensively used in the USA. /Copper salts/

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Superlist Classes1

  • ATSDR Profile Priority List, rank : 133
  • Reportable Quantity (RQ) = 5000 lb
  • TWA 0.2 mg/m3 (fume), 1 mg/m3 (dusts & mists, as Cu)
  • TWA (0.1 mg/m3, fume; 1 mg/m3 dusts and mists)

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Notes (Sources: NTP,HSDB,RTECS,MESH)1

  • None found

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Other Registry Numbers1

  • 133353-46-5
  • 133353-47-6
  • 195161-80-9
  • 65555-90-0
  • 72514-83-1

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Synonyms (Sources: NTP, HSDB,RTECS,MESH)1

  • C.I. 77400
  • M3R
  • M3S
  • E 115 (metal)
  • M1 (Copper)
  • M2 (Copper)
  • M3 (Copper)
  • M4 (Copper)
  • 1721 Gold
  • C.I. Pigment Metal 2
  • Allbri natural copper
  • ANAC 110
  • Arwood copper
  • Bronze powder
  • CDA 101
  • CDA 102
  • CDA 110
  • CDA 122
  • CE 1110
  • CI 77400
  • CI Pigment metal 2
  • Copper M 1
  • Copper bronze
  • Copper, metallic powder
  • Copper powder
  • Copper slag-airborne
  • Copper slag-milled
  • Copper-airborne
  • Copper-milled
  • CU M3
  • Gold bronze
  • HSDB 1622
  • Kafar copper
  • OFHC Cu
  • Raney copper

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Links to Additional Information1

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Footnotes

1 Source: the National Library of Medicine's ChemIDPlus, 10/28/2007.

2 Source: the National Library of Medicine's Hazardous Substance Database, 10/28/2007.

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Web page last updated on May 14, 2008