Platinum

21.45 (NIOSH, 2024) - Denser than water; will sink

21.447 (calc)

21.45 g/cm³

21.45

21.45 @25 °C

21.45

Insoluble (NIOSH, 2024)

Soluble in aqua regia. Insoluble in mineral and organic acids.

Solubility in water: insoluble

Insoluble

6921 °F at 760 mmHg (NIOSH, 2024)

3825 °C

3827 °C

6921 °F

3825 °C @760 [mm Hg]

6921 °F

3222 °F (NIOSH, 2024)

1772 °C.

1768.4 °C

1768.3 °C

1769 °C

3222 °F

0 mmHg (approx) (NIOSH, 2024)

0.0187 Pa @ melting point

0 mmHg (approx)

depends upon the specific compound

0 mmHg (approx)

Silvery, whitish-gray, malleable, ductile metal. Mp: 1772 °C; bp: 2187 °C. Density: 21.45 g cm-3 at room conditions (very dense). Also shipped as a finely divided powder (platinum black), as a sponge, and as particles deposited on a supporting material such as alumina. Has strong catalytic activity in these forms; finely divided platinum can be dangerous to handle in the vicinity of other chemicals on this account. Used platinum catalysts are particularly dangerous and can be explosive.

Appearance and odor vary depending upon the specific soluble platinum salt. [NIOSH]

Silver-grey lustrous solid; Also available as black powder (platinum black) and spongy solid (platinum sponge); [Merck Index]

Solid

BLACK POWDER.

Silvery, whitish-gray, malleable, ductile metal.

Sp heat: 0.0314 cal/g at 0 °C. Electrical resistivity: (20 deg) 10.6 uohm-cm.

/Platinum/ occurs naturally mainly as the isotopes (194)Pt, (195)Pt, and (196)Pt.

Heated platinum adsorbs large amounts of hydrogen; it is a strong complexing agent.

This chemical does not meet GHS hazard criteria for 81.3% (410 of 504) of all reports.

Danger

H228 (10.7%): Flammable solid [Danger Flammable solids]

P210, P240, P241, P280, and P370+P378 (click each P-code to see the statement)

Aggregated GHS information provided per 504 reports by companies from 13 notifications to the ECHA C&L Inventory.；Reported as not meeting GHS hazard criteria per 410 of 504 reports by companies.；There are 11 notifications provided by 94 of 504 reports by companies with hazard statement code(s).；Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website.

Chemical: Platinum

Status: Active Update: 28-09-2022 https://echa.europa.eu/registration-dossier/-/registered-dossier/19458

Platinum: Does not have an individual approval but may be used under an appropriate group standard

The New Jersey Worker and Community Right to Know Act requires public and private employers to provide information about hazardous substances at their workplaces. (N.J.S.A. 34:5A-1 et. seq.)

Excerpt from ERG Guide 170 [Metals (Powders, Dusts, Shavings, Borings, Turnings, or Cuttings, etc.)]:；May react violently or explosively on contact with water. Some are transported in flammable liquids. May be ignited by friction, heat, sparks or flames. Some of these materials will burn with intense heat. Dusts or fumes may form explosive mixtures in air. Containers may explode when heated. May re-ignite after fire is extinguished. (ERG, 2024)

See Chemical dangers

The allergenic compounds appear to be limited to the coordination complexes containing halogen ligands as leaving groups with the most potent examples being hexa- and tetrachloroplatinates. [Nordberg, p. 1138] Occupational asthma reported in platinum refinery; [Malo] Allergic contact dermatitis in electronics workers; [Marks] Platinum salts can cause immunologic, occupational contact urticaria; [Kanerva, p. 219] There is evidence from pharmacologic use that platinum is nephrotoxic. [Rosenstock, p. 572]

A skin, eye, and respiratory tract irritant; [Merck Index] Catalytic material that is fire and explosion hazard on contact with many organic and inorganic substances; An eye and respiratory tract irritant; (powdered form) [ICSC] Platinum oxides and soluble platinum salts are sensitizers. Platinum is nontoxic in the metallic state, except possibly for the fine powdered form. [Sullivan, p. 911, 913] Platinum dust is inert and nonallergenic; [Nordberg, p. 1136] Tram drivers in Rome were exposed to Pt, Rh and Pd from catalytic converters at levels about 10 times lower than those known to cause adverse effects in workers. [PMID 18849761] In a study of platinum nanoparticles, platinum ions were not released into the culture media suggesting minimal cellular influence; [PMID 21804981] See Platinum, soluble salts.

Massive platinum (lump, ingot, etc.) is generally inert. Dissolves readily in aqua regia (mixture of concentrated hydrochloride and concentrated nitric acids). Reacts rapidly with molten alkali metal oxides and peroxides. Reacts with F2 and Cl2 at red heat. Absorbs large volumes of hydrogen when hot. Catalyzes the exothermic oxidation of ammonia by air. Finely divided platinum is incompatible with aluminum, acetone, arsenic, ethane, hydrazine, hydrogen peroxide, lithium, phosphorus, selenium, tellurium and many fluorides. Explosion can occur upon contact with hydrogen peroxide. Platinum black, sponge and supported catalysts have strong catalytic activity; can be dangerous to handle in the vicinity of other chemicals on this account. Used platinum catalysts are particularly dangerous and can cause explosions. Ethanol or methanol can ignite on contact with a platinum-black catalyst. (Urben 1794).

Excerpt from ERG Guide 170 [Metals (Powders, Dusts, Shavings, Borings, Turnings, or Cuttings, etc.)]:；DO NOT USE WATER, FOAM OR CO2. Dousing metallic fires with water will generate hydrogen gas, an extremely dangerous explosion hazard, particularly if fire is in a confined environment (i.e., building, cargo hold, etc.). Use DRY sand, graphite powder, dry sodium chloride-based extinguishers, or class D extinguishers. Confining and smothering metal fires is preferable rather than applying water. If it can be done safely, move undamaged containers away from the area around the fire.；FIRE INVOLVING TANKS, RAIL TANK CARS OR HIGHWAY TANKS: If impossible to extinguish, protect surroundings and allow fire to burn itself out. (ERG, 2024)

In case of fire in the surroundings, use appropriate extinguishing media.

Fresh air, rest.

Remove contaminated clothes. Rinse and then wash skin with water and soap.

First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.

Rinse mouth. Refer for medical attention .

Excerpt from NIOSH Pocket Guide for Platinum:；Eye: IRRIGATE IMMEDIATELY - If this chemical contacts the eyes, immediately wash (irrigate) the eyes with large amounts of water, occasionally lifting the lower and upper lids. Get medical attention immediately.；Skin: SOAP WASH - If this chemical contacts the skin, wash the contaminated skin with soap and water.；Breathing: RESPIRATORY SUPPORT - If a person breathes large amounts of this chemical, move the exposed person to fresh air at once. If breathing has stopped, perform artificial respiration. Keep the affected person warm and at rest. Get medical attention as soon as possible.；Swallow: MEDICAL ATTENTION IMMEDIATELY - If this chemical has been swallowed, get medical attention immediately. (NIOSH, 2024)

(General first aid procedures)；Eye: Irrigate immediately - If this chemical contacts the eyes, immediately wash (irrigate) the eyes with large amounts of water, occasionally lifting the lower and upper lids. Get medical attention immediately.；Skin: Soap wash - If this chemical contacts the skin, wash the contaminated skin with soap and water.；Breathing: Respiratory support；Swallow: Medical attention immediately - If this chemical has been swallowed, get medical attention immediately.

Persons not wearing protective equipment and clothing should be restricted from areas of spills until cleanup has been completed. If soluble platinum salts or liquids containing soluble salts are spilled, the following steps should be taken: 1. Ventilate area of spill; 2. Collect spilled material in the most convenient and safe manner for reclamation or for disposal in a secured sanitary landfill. Liquids containing soluble platinum salts should be absorbed in vermiculite, dry sand, earth, or a similar material, /Soluble platinum salts/

Excerpt from ERG Guide 170 [Metals (Powders, Dusts, Shavings, Borings, Turnings, or Cuttings, etc.)]:；ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area. Do not touch or walk through spilled material. Stop leak if you can do it without risk. Prevent entry into waterways, sewers, basements or confined areas. (ERG, 2024)

SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.

Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Then store and dispose of according to local regulations.

Adequate ventilation and protectors. Induce workers to wash constantly.

Eating and smoking should not be permitted in areas where soluble platinum salts or liquids containing soluble platinum salts are handled, processed, or stored. Employees who handle soluble platinum salts or liquids containing soluble platinum salts should wash their hands thoroughly before eating, smoking, or using toilet facilities. /Soluble platinum salts/

Respirators may be used when engineering and work practice controls are not technically feasible, when such controls are in the process of being installed, or when they fail and need to be supplemented. ... If the use of respirators is necessary, the only respirators permitted are those that have been approved by the Mine Safety and Health Admin (formerly Mining Enforcement & Safety Admin) or by the National Institute for Occupational Safety & Health. In addition to respirator selection, a complete respiratory protection program should be instituted which includes regular training, maintenance, inspection, cleaning, and evaluation. /Soluble platinum salts/

Control can only be achieved by preventing the release of the soluble complex platinum salts to the atmosphere of the workshop. Good exhaust ventilation is necessary in platinum refineries. Chemical procedures which may generate these salts should be carried out in ventilated fume cupboards. Open centrifuges should not be used. Good personal hygiene is important. /Platinum compounds/

For more Preventive Measures (Complete) data for PLATINUM (10 total), please visit the HSDB record page.

Excerpt from ERG Guide 170 [Metals (Powders, Dusts, Shavings, Borings, Turnings, or Cuttings, etc.)]:；IMMEDIATE PRECAUTIONARY MEASURE: Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids.；LARGE SPILL: Consider initial downwind evacuation for at least 50 meters (160 feet).；FIRE: If tank, rail tank car or highway tank is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2024)

Nephrotoxin - The chemical is potentially toxic to the kidneys in the occupational setting.；Skin Sensitizer - An agent that can induce an allergic reaction in the skin.；Asthma - Reversible bronchoconstriction (narrowing of bronchioles) initiated by the inhalation of irritating or allergenic agents.

The substance can be absorbed into the body by inhalation.

inhalation, ingestion, skin and/or eye contact

Cough. Sore throat.

Redness. Pain.

irritation skin, respiratory system; dermatitis

Platinum metal itself is not associated with any neurological diseases ... .

Clinical signs & symptoms of platinum exposure & toxicity via inhalation & dermal routes are those of classic allergic reactions & include irritation of the eyes & nose; cough, dyspnea, wheezing, & cyanosis; skin sensitization; & lymphocytosis.

Effects on human sperm motility were investigated ... Fresh sperm were incubated for up to5 hr in the presence of strips of platinum or other metals. Motility after 2 and 5 hr was 60 and 30%, respectively, compared to 10 and 0% for copper, 40 and 7% for silver, and 90 and 65% for gold.

Some workers may show ... allergic manifestations with involvement of the nasal mucosa, bronchi and skin. /Platinum cmpd/

Platinum wire inserted into the uterus of rats was reported to reduce the implantation of fertilized ova. An 83% reduction in the number of implantation sites in the affected uterine horn, compared to the unoperated horn, was found in rats unilaterally implanted on day 3. ... No effect /was found/ on embryonic or fetal survival if platinum wire was inserted after implantation on day 6.

... Normal fertility /was found/ in male rabbits with open tube gold/platinum devices inserted into the vas deferens. There was an initial decrease in sperm count and motility, but these parameters returned to normal after three weeks. At 117-426 days after insertion, 7 out of 9 animals were fertile in numerous matings.

Basic treatment: Establish a patent airway. Suction if necessary. Watch for signs of respiratory insufficiency and assist ventilations if needed. Administer oxygen by nonrebreather mask at 10 to 15 L/min. Monitor for pulmonary edema and treat if necessary ... . Monitor for shock and treat if necessary ... . Anticipate seizures and treat if necessary ... . For eye contamination, flush eyes immediately with water. Irrigate each eye continuously with normal saline during transport ... . Do not use emetics. For ingestion, rinse mouth and administer 5 ml/kg up to 200 ml of water for dilution if the patient can swallow, has a strong gag reflex, and does not drool ... . Cover skin burns with dry sterile dressings after decontamination ... . /Poison A and B/

Advanced treatment: Consider orotracheal or nasotracheal intubation for airway control in the patient who is unconscious, has severe pulmonary edema, or is in respiratory arrest. Positive pressure ventilation techniques with a bag valve mask device may be beneficial. Monitor cardiac rhythm and treat arrhythmias as necessary ... . Start an IV with D5W /SRP: "To keep open", minimal flow rate/. Use lactated Ringer's if signs of hypovolemia are present. Watch for signs of fluid overload. Consider drug therapy for pulmonary edema ... . For hypotension with signs of hypovolemia, administer fluid cautiously. Watch for signs of fluid overload ... . Treat seizures with diazepam (Valium) ... . Use proparacaine hydrochloride to assist eye irrigation ... . /Poison A and B/

Chemical: Platinum

Status: Active Update: 28-09-2022 https://echa.europa.eu/registration-dossier/-/registered-dossier/19458

Platinum: Does not have an individual approval but may be used under an appropriate group standard

The New Jersey Worker and Community Right to Know Act requires public and private employers to provide information about hazardous substances at their workplaces. (N.J.S.A. 34:5A-1 et. seq.)

Platinum is rapidly distributed to most tissues of the body, with a large proportion of the dose being excreted within a few hours. This initial high plasma concentration falls quickly, and the great majority of the remaining Pt is protein bound. Platinum is mainly excreted in the urine ... .

Platinum is used as a catalyst in petroleum refining and in catalytic converters for automobile exhaust. [ACGIH] Platinum is used in the following industries: automotive, chemical, petroleum, electrical, jewelry, pharmaceutical, ceramics, dental, and plastics. [Harber, p. 473] Platinum chloride used in photography (toner and platinum printing); [www.ci.tucson.az.us/arthazards/medium.html] Workers are exposed to platinum in plants for the production and recycling of catalytic converters; [Reference #2]

Petroleum Production and Refining [Category: Industry]；Semiconductor Manufacturing [Category: Industry]；Photographic Processing [Category: Other]；Metal Extraction and Refining [Category: Industry]

Jewelry making [Category: Hobbies]；Applying metallic patinas [Category: Hobbies]

Found alloyed with iridium, osmium, palladium, rhodium, and ruthenium in gravels and sands; [Merck Index] Used to make apparatus for laboratory and industrial use (thermocouples, platinum resistance thermometers, acid proof containers, electrodes, etc.); in dentistry, jewelry, and electroplating; in spinnerets for making rayon, electrical contacts, and glass fiber; in permanent magnets; to increase the octane number of liquid fuels; in automobile catalytic converters; as catalyst for curing of plastics; as catalyst for dehydrogenation, isomerization, and oxidation in the production of sulfuric, nitric, and organic acids and amines; for surgical instruments and implants; Platinum nanoparticles are used in scanning probes (microscopy) and catalysts; [HSDB]

Metal Preparation and Pouring [Category: Foundry]；Metal Machining [Category: Heat or Machine]；Electroplating [Category: Plate]；Textiles (Fiber & Fabric Manufacturing) [Category: Industry]

Jewelry making [Category: Hobbies]

Mine: (1999) 2,920 kg; (1998) 3,240 kg; (1997) 2,610 kg; (1996) 1,840 kg; (1995) 1,590 kg

Refinery: (1999) 14,000 kg

By dissolving the ore concentrate in aqua regia, precipitating the platinum by ammonium chloride as ammonium hexachloroplatinate, igniting the precipitate to form platinum sponge. This is then melted in an oxyhydrogen flame or in an electric furnace.

Nickel refinery anode slimes/copper anodic slimes/ Mond process residues (sulfating roast process/ hydrometallurgical refining; coproduced with gold/silver/palladium/selenium/tellurium)

Grade: Physically pure (99.99%), chemically pure (99.99%), crucible platinum (99.5%), commercial (99.0%).

Forms available: Powder (platinum black), single crystals, wire (2 by 0.05 inches diameter); special composition for electronics, metallizing and decorating ceramics and metals.

Platinum: ACTIVE

Nickel, osmium, ruthenium, copper, gold, silver and iridium are alloyed with platinum to increase hardness. Commercially important alloys of platinum are prepared with copper, gold, iridium, rhodium and ruthenium. Alloys with cobalt have become important because of their strong ferromagnetic properties.