Sodium metaborate

65.8

65.99000

231-891-6

Z6Q395A23R

DTXSID2034386

White pieces or powder|White hexagonal crystals

2840200000

40.1

-0.88610

Liquid

2.464 g/cm³

966 °C

1434 °C

g/100g solution H2O: 14.10 (0°C), 22.00 (25°C), 55.60 (100°C); solid phase, NaBO2 ·4H2O (0°C, 25°C), NaBO2 · 2H2O (100°C)

Store in a cool, dry, well ventilated location. Protect from heat, shock and friction. Keep containers closed.

ODORLESS

Solution is strongly alkaline when dissolved in water

Standard enthalpy of formation: -977.0 kJ/mol; molar heat capacity: 65.9 J/K mol at 25 °C|Enthalpy of fusion: 36.2 kJ/mol at 966 °C|Molecular weight: 101.83; white, odorless, crystalline granules; specific gravity: 1.91; vapor pressure: negligible at 20 °C; solubility in water: 31.0% at 20 °C, 81.1% at 100 °C; pH at 20 °C: 10.6 (0.1% solution), 11.1 (1.0% solution), 11.5 (4.0% solution); melting point: 90-95 °C /Sodium metaborate dihydrate/|Triclinic; loses water slowly at room temperature; heat of hydration to NaBO2.0.5H2O has been calculated as 58.1 kJ/mol /Sodium metaborate dihydrate/|Molecular weight: 137.86; white, odorless, crystalline granules; specific gravity: 1.74; vapor pressure: negligible at 20 °C; solubility in water: 41.9% at 20 °C, 109.8% at 100 °C; melting point: 53.5 °C /Sodium metaborate tetrahydrate/|pH of aqueous solution at 20 °C as a function of wt%: 10.52 at 0.1%; 10.8 at0.5%; 11.0 at 1.0%;11.3 at 20%; 11.4 at 4.0%; 11.8 at 10.0%; 12.0 at 15.0% /Sodium metaborate tetrahydrate/

NON-CORROSIVE TO FERROUS METALS

UN3077(solid)

The crystals will pick up carbon dioxide if exposed to air, forming sodium carbonate and Borax.

P201, P202, P264, P280, P281, P302+P352, P305+P351+P338, P308+P313, P321, P332+P313, P337+P313, P362, P405, P501

H315

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.

Sodium metaborate is an indirect food additive for use only as a component of adhesives.

USEPA/OWRS; Quality Criteria for Water 1986 Boron (1986) EPA 440/5-86-001

|Warning|H315 (16.47%): Causes skin irritation [Warning Skin corrosion/irritation]|P201, P202, P264, P280, P281, P302+P352, P305+P351+P338, P308+P313, P321, P332+P313, P337+P313, P362, P405, and P501|Aggregated GHS information provided by 925 companies from 9 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.|Danger|H360FD: May damage fertility; May damage the unborn child [Danger Reproductive toxicity]|P201, P202, P281, P308+P313, P405, and P501

Wear goggles or face shield when handling. /Tetrahydrate/

Nonflammable /tetrahydrate/

Formulated products, Danger: Keep Out of Reach of Children, Corrosive. ... Avoid contact with skin. Wash thoroughly after handling. /Tetrahydrate/|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.

Moderate skin irritant /Tetrahydrate/|... May produce irritation of the nasal mucous membranes, the respiratory tract, and eyes. /Boron compounds/

LD50 Rats oral 2330 mg/kg

Terrestrial Fate: Resultant avg persistence at recommended rates: One growing season in areas of 90 cm (35 inches) precipitation or greater. Rapid leaching in high rainfall areas. /Sodium metaborate tetrahydrate/

Reacts with atmospheric carbon dioxide to produce sodium carbonate and borax. /Sodium metaborate dihydrate/

ACCUMULATES IN PLANTS. /SODIUM METABORATE TETRAHYDRATE/|SOCKEYE SALMON (ONCHORHYNCHUS NERKA) & JUVENILE OYSTERS (CRASSOSTREA GIGAS) EXPOSED TO SUBLETHAL DOSES OF BORON (SODIUM METABORATE) TAKE UP BORON ROUGHLY IN RELATION TO ITS AVAILABILITY. OYSTERS SHOW NO BIOACCUMULATIVE POTENTIAL OR PROLONGED RETENTION FOLLOWING CESSATION OF DOSAGE. FIELD SURVEYS CONDUCTED BEFORE & AFTER INDUSTRIAL BORATE EMISSION CONFIRM LACK OF EVIDENCE FOR TISSUE BIOACCUMULATION.

Some adsorption of borate on clay. /Sodium metaborate tetrahydrate/

Sodium borate and boric acid are used in various cosmetic products, including make-up, skin and hair care preparations, deodorants, moisturizing creams, breath fresheners, and shaving creams; concentrations may be up to 5%(1).

Excretion occurs primarily in the urine. The kidneys are more seriously damaged because of highest concentration reached during excretion.

Boric acid, sodium salt and borates are not metabolized, neither do they accumulate in the body except for low deposit in bone. No organic boron compounds have been reported as metabolites.

Maintain an open airway and assist ventilation if nescessary. treat coma, seizures, hypotension, and renal failure if they occur. There is no specific antidote. Administer activated charcoal (although boric acid is not well absorbed). Consider gastric lavage for large ingestions. /Boric acid, Borates, and Boron/|Hemodialysis is effective and is indicated after massive ingestions and for supportive care of renal failure. Peritoneal dialysishas not proved effective in enhancing elimination in infants. /Boric acid, Borates, and Boron/|In acute poisonings, if a large amount has been ingested and the patient is seen within one hour of exposure, gastrointestinal decontamination should be considered ... .It is important to keep in mind that vomiting and diarrhea are common, and severe poisoning may be associated with seizures. Therefore induction of emesis by syrup of ipecac is probably contraindicated in these exposures. Catharsis is not indicated if diarrhea is present. /Boric acid and Borates/|If ingestion of borate has been massive (several grams), or has extended over several days, administer intravenous glucose and electrolyte solutions to sustain urinary excretion of borate. Monitor fluid balance and serum electrolytes (including bicarbonate capacity ) regularly. Monitor cardiac status by ECG. Test the urine for proteins and cells to detect renal injury, and monitor serum concentration of borate. Metabolic acidosis may be treated with sodium bicarbonate. If shock develops, it may be necessary to infuse plasma or whole blood. Administer oxygen continuously. If oliguria (less than 25 to 30 mL urine per hour) occurs, intravenous fluids must be slowed or stopped to avoid overloading the circulation. Such patients should be referred to a center capable of providing intensive care for critically ill patients. /Boric acid and Borates/|For more Antidote and Emergency Treatment (Complete) data for SODIUM METABORATE (7 total), please visit the HSDB record page.

/HUMAN EXPOSURE STUDIES/ This study (1) charted chemosensory feel, denoted chemesthesis here, to dusts of calcium oxide (1 to 5 mg/cu m), sodium tetraborate pentahydrate [sodium borate] (5 to 40 mg/cu m), and calcium sulfate (10 to 40 mg/cu m); (2) examined correlates of the chemesthetic sensations; and (3) sought to illuminate the basis for potency. Twelve screened men exercised against a light load while they breathed air in a dome fed with controlled levels of dust for 20 min. Measured parameters included nasal resistance, nasal secretion, minute ventilation, heart rate, blood oxygenation, mucociliary transport time, and chemesthetic magnitude, calibrated to pungency of carbon dioxide. Subjects registered time-dependent feel from exposures principally in the nose, secondarily in the throat, and hardly in the eyes. Calcium oxide had the greatest potency, followed by sodium borate, with calcium sulfate a distant third. Of the physiological parameters, amount of secretion showed the best association with chemesthetic potency. That measure, as well as mucociliary transport time and minute ventilation, went into calculation of mass of dust dissolved into mucus. The calculations indicated that the two alkaline dusts increased in equal molar amounts with time. At equal molar concentrations, they had, to a first approximation, equal chemesthetic magnitude. On the basis of mass concentration in air or dissolved into mucus, calcium oxide and sodium borate differed in potency by a factor just above five, equal to the difference in their molecular weights.|/SIGNS AND SYMPTOMS/ Symptoms of poisoning: Nausea, diarrhea, rashes, depression, and coma. /Tetrahydrate/|/SIGNS AND SYMPTOMS/ This study examined work-related chronic abnormality in pulmonary function and work-related acute irritant symptoms associated with exposure to borate dust in mining and processing operations. Chronic effects were examined by pulmonary function at the beginning and end of a 7-year interval. Time-specific estimates of sodium borate particulate exposures were used to estimate cumulative exposure during the study interval. Change in pulmonary function over the 7 years was found unrelated to the estimate of cumulative exposure during that interval. Exposure-response associations also were examined with respect to short-term peak exposures and incidence of five symptoms of acute respiratory irritation /including eye, nose, and throat irritation; sneezing; nose bleeds; coughing; and breathlessness/. Hourly measures of health outcome and continuous measures of particulate exposure were made on each subject throughout the day. Whenever a subject reported one of the irritant symptoms, a symptom intensity score was also recorded along with the approximate time of onset. The findings indicated that exposure-response relationships were present for each of the specific symptoms at several symptom intensity levels. The associations were present when exposure was estimated by both day-long and short-term (15-min) time-weighted average exposures. Associations persisted after taking account of smoking, age, and the presence of a common cold. No significant difference in response rate was found between workers exposed to different types of sodium borate dusts.|/EPIDEMIOLOGY STUDIES/ An investigation was begun into the potential reproductive effects of sodium borates on men working in a sodium-borate mining and production factory in the Mojave Desert, California. The study group included 542 men, 72% of those eligible to participate. There were 529 births fathered by the study participants when only 466.6 were expected. The men were divided into five groups based on the exposure level to sodium-borate. There were minor differences in the groups, but none was significant. The number of births among the older men who had worked at the facility longest was very near the expected level. No adverse effects on fertility could be linked with the periods of high exposure. Of all offspring among the exposed men, 52.7% were female. The usual ratio is 51.2% male and 48.8% female; the excess of female offspring was not significant. Primarily female offspring were fathered by the employees in the RESR area, pilot facility. Those who chose not to participate in the study were not demographically different from the participants. The authors conclude that there did not appear to be any hazards to reproductive efforts resulting from exposure to sodium-borate. /Sodium Borate/

disodium borate, heptahydrate

... Available commercially as octahydrate and tetrahydrate.|Granular, water soluble /Ureabor/|Multiple active ingredients: Granular 94.0% + 1 active ingredient (AI), 68.0% + 1 AI, 66.5% + 2 AIs, 55.6% +2 AIs, 54.0% + 1 AI, 50.0% + 2 AIs; Pelleted/Tableted 50.0% + 3 AIs; Formulation not identified/solid 50.0% + 1 AI; Soluble concentrate/liquid 19.0% + 1 AI, 10.0% + 1 or 2 AIs, 9.08% + 1 AI, 9.0% + 1 AI, 8.75% + 2 AIs, 6.0% + 1 AI, 4.57% + 1 AI; Ready to use liquid 10.0% + 1 AI.

All other chemical product and preparation manufacturing|Boric acid (HBO2), sodium salt (1:1): ACTIVE|... Sodium metaborate ... was introduced as /a non-selective herbicide/ by US Borax & Chemical Corp /protected by/ US patent 3,032,405.|Application methods: Dry or spray over-all; preemergence or postemergence. Rates: 0.25 to 2 kg/10 cu m ... Lighter rates for annuals; heavier for deep rooted perennials and prepaving treatment. Usual carrier: Water: 1 kg/4l; 1000 to 8000 l/ha ... /Tetrahydrate/|Use limitations: Sodium metaborate is not selective and may be toxic to all types of vegetation. It may render the entire area totally or partially unproductive for one or more years. Take care to confine application to the particular area intended to be treated and prevent its contact with lawns trees, shrubs, crops and other desirable plants which are not intended to be destroyed or injured. This includes precautions in treating areas which may be underlaid by roots of adjacent valuable plants. Do not drain or flush equipment near these areas.|Borate is the accepted common name for the metal salts of boric acid which comprise the following family of chemicals: sodium tetraborate decahydrate, sodium tetraborate pentahydrate, sodium tetraborate (anhydrous borax), disodium octaborate (anhydrous), disodium octaborate tetrahydrate, and sodium metaborate. /Borates/|Sodium perborates are persalts that are hydrolytically unstable because they contain characteristic boron-oxygen-oxygen bonds that react with water to form hydrogen peroxide and stable sodium metaborate (NaBO2.nH2O). This hydrolysis reaction is the basis of the use of perborates as bleaches in detergents at high (70-100 °C) temperature. At lower washing temperatures (25-70 °C), activators are needed; these react with peroxide to give peracids, which are stronger oxidants and give bleaching effects at lower temperatures.