Iron sulfide (FeS)

87.91

87.907013

215-268-6

DTXSID5061665

Colorless hexagonal crystals when pure; usually gray to brownish-black lumps, rods or granular powder; trimorphic with transition points @ 135 and 325 °C|Dark-brown or black metallic pieces, sticks, or granules

28309011

32.09000

0.64570

Grayish-black Sticks

4.84 g/cm³

1194 °C

Deomposes

soluble in water(0.0062g/L ),in acids with evolution of hydrogen sulfide. Insoluble in nitric acid.

Storage temperature: no restrictions.

Decomposes in hot water|Oxidized by moist air to S and Fe3O4.|Standard molar enthalpy (heat) of formation at 298.15 deg K is -100.0 kJ/mol (crystal); Standard molar Gibbs energy of formation at 298.15 deg K is -100.4 kJ/mol (crystal); Standard molar entropy at 298.15 deg K is 60.3 J/mol/K (crystal); Molar heat capacity at constant pressure at 298.15 deg K is 50.5 J/mol/K (crystal)|Molar enthalpy (heat) of fusion 31.5 kJ/mol at 1188 °C|Sugar, glycerin, & many organic hydroxy acids hinder precipitation. In neutral solution, soluble carbonates, phosphates, & oxalates produce precipitation. /Ferrous salts/

III

4.1

UN 3077 9/PG 3

3

31-50

60-61-50

N

Stable. Incompatible with strong acids, strong bases, metal oxides. Avoid moisture.

SRP: The most favorable course of action is to use an alternative chemical product with less inherent propensity for occupational exposure or environmental contamination. Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier. Ultimate disposal of the chemical must consider: the material's impact on air quality; potential migration in soil or water; effects on animal, aquatic, and plant life; and conformance with environmental and public health regulations.

The use of steel equipment in conjunction with hydrogen sulfide or volatile sulfide compounds will cause it to spontaneously explode in air.|Violent reaction with lithium when heated above 260 °C.|Hydrogen peroxide reacts vigorously with ... ferrous sulfide.

.../Ferrous sulfide/ is occasionally formed unintentionally when materials containing sulfur are treated in iron and steel vessels- eg in petroleum refineries. If the plant is opened and the deposit of ferrous sulfide is exposed to air, its exothermic oxidation may raise temp of gases and vapors in the vicinity. A fine water spray should be directed on such deposits until flammable vapors have been removed by purging. Similar problems may occur in pyrite mines where the air temperature is increased by a continuous slow oxidation of ore.

SRP: The scientific literature for the use of contact lenses in industry is conflicting. The benefit or detrimental effects of wearing contact lenses depend not only upon the substance, but also on factors including the form of the substance, characteristics and duration of the exposure, the uses of other eye protection equipment, and the hygiene of the lenses. However, there may be individual substances whose irritating or corrosive properties are such that the wearing of contact lenses would be harmful to the eye. In those specific cases, contact lenses should not be worn. In any event, the usual eye protection equipment should be worn even when contact lenses are in place.|All ... /iron/ preparations should be kept in child-proof bottles. /Iron preparations/

If inhaled, iron is a local irritant to the lung and gastrointestinal tract. /Iron compounds/

Recommended Exposure Limit: 10 Hr Time-Weighted Avg: 1 mg/cu m. /Iron salts (soluble, as Fe)/

...There is concern that the individual with metabolic defects that impair the ability to regulate iron absorption will be at risk from excessive exposure to iron, primarily as a result of acceleration of accumulation of iron in the body and an earlier onset of clinical symptoms of the disease. /Iron salts/

...as the minerals: magnetkies, pyrrhotine, troillite.

Pseudomelanosis duodeni is a rare benign condition. It manifests endoscopically as discrete, flat, small brown-black spots in the duodenal mucosa. It produces no symptoms and may be reversible. ... With electron microscopy and electron-probe energy dispersive X-ray analysis, the pigment corresponds principally to an accumulation of ferrous sulfide (FeS) in macrophages within the lamina propria.|...The case of a 16-yr-old boy with ectodermal dysplasia who underwent renal transplantation for vesicoureteral reflux and later developed epigastric pain /is reported/. Endoscopic and pathologic findings in the duodenal mucosa were typical of pseudomelanosis duodeni.|...The case of a 56-yr-old female patient with a past history of diabetes mellitus and hypertension /is reported/. She was admitted because of nausea, vomiting, and diarrhea and underwent esophagogastroduodenoscopy because of stool occult blood test results of 3+ /SRP: extremely positive/. Endoscopy revealed diffusely scattered black spots in the bulb and second portion of the duodenum. Histological examination showed numerous pigment-laden macrophages in the lamina propria of mucosal villi. The diagnosis requires further confirmation by electron microscopy and electron-probe energy dispersive X-ray microanalysis. No special therapy is indicated for this rare lesion.

Maintain an open airway and assist ventilation if necessary. Treat shock caused by hemorrhagic gastrointestinitis aggressively with intravenous crystalloid fluids, and replace blood if needed. Patients are often markedly hypovolemic owing to gastrointestinal losses and third spacing of fluids into the intestinal wall and interstitial space. Treat coma, seizures, and metabolic acidosis if they occur. For seriously intoxicated victims (eg, shock, severe acidosis, and/or serum iron > 500-600 mcg/dL) administer deferoxamine. Monitor the urine for the urine for the characteristic orange or pink deferoxamine-iron complex. Therapy may be stopped when the urine returns to normal or when the serum iron level decreases to the normal range. Prolonged deferoxamine has been associated with adult respiratory distress syndrome and Yersinia sepsis.|Activated charcoal is not effective. Ipecac is not recommended, because it can aggravate iron-induced gastrointestinal irritation and interfere with whole bowel irrigation. Consider gastric lavage if product was a liquid formulation or tablets were chewed. Do-not use phosphate-containing solutions for lavage; these may result in life-threatening hypernatremia, hyperphosphatemia, and hypocalcemia. Bicarbonate and deferoxamine lavage are of doubtful efficacy. Deferoxamine lavage is not effective and may enhance iron absorption. Whole-bowel irrigation is very effective for ingested tablets and may be considered first-line treatment, especially if large numbers of tablets are visible on plain abdominal x-ray. Massive ingestions may lead to concretions or bezoars. Repeated or prolonged whole-bowel irrigation may remove tablets. Endoscopy or surgical gastrotomy is rarely required.|Hemodialysis and hemoperfusion are not effective for removing iron but may be necessary to remove iron-deferoxamine complex in patients with renal failure. Exchange transfusion is occasionally used for massive pediatric ingestions but is of questionable efficacy.|Basic treatment: Establish a patent airway. Suction if necessary. Watch for signs of respiratory insufficiency and assist ventilations if necessary. Administer oxygen by nonrebreather mask at 10 to 15 L/min. Monitor for shock 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. /Iron and related compounds/|Advanced treatment: Consider orotracheal or nasotracheal intubation for airway control in the patient who is unconscious. Monitor cardiac rhythm and treat arrhythmias if necessary ... . Start an IV with lactated Ringer's /SRP: "To keep open", minimal flow rate/. Watch for signs of fluid overload. For hypotension with signs of hypovolemia, administer fluid cautiously. Watch for signs of fluid overload ... . Use proparacaine hydrochloride to assist eye irrigation ... . /Iron and related compounds/

/SIGNS AND SYMPTOMS/ Pseudomelanosis duodeni is a rare benign condition. It manifests endoscopically as discrete, flat, small brown-black spots in the duodenal mucosa. It produces no symptoms and may be reversible. ... With electron microscopy and electron-probe energy dispersive X-ray analysis, the pigment corresponds principally to an accumulation of ferrous sulfide (FeS) in macrophages within the lamina propria.|/CASE REPORTS/ ...The case of a 56-yr-old female patient with a past history of diabetes mellitus and hypertension /is reported/. She was admitted because of nausea, vomiting, and diarrhea and underwent esophagogastroduodenoscopy because of stool occult blood test results of 3+ /SRP: extremely positive/. Endoscopy revealed diffusely scattered black spots in the bulb and second portion of the duodenum. Histological examination showed numerous pigment-laden macrophages in the lamina propria of mucosal villi. The diagnosis requires further confirmation by electron microscopy and electron-probe energy dispersive X-ray microanalysis. No special therapy is indicated for this rare lesion.|/CASE REPORTS/ ...The case of a 16-yr-old boy with ectodermal dysplasia who underwent renal transplantation for vesicoureteral reflux and later developed epigastric pain /is reported/. Endoscopic and pathologic findings in the duodenal mucosa were typical of pseudomelanosis duodeni.

ferrous sulfide

The commercial product is approximately 75-80% FeS.|The removal of SO2, NOx, CO, and unburned hydrocarbons from the exhaust gases of internal combustion engines involves contacting these gases with ferrous sulfide.|Free and complex cyanides are removed from wastewater and other wastes by treatment with insoluble iron sulfides, including ferrous sulfide, at pH approximately 7.0-8.5.|Lead is removed from wastewater by passing the effluents through a column containing ferrous sulfide. The wastewater is adjusted to pH 3.0-3.5 and the lead precipitates as lead sulfide.|For more General Manufacturing Information (Complete) data for FERROUS SULFIDE (7 total), please visit the HSDB record page.