Chemical Name:	Tantalum/Tungsten
Formula:	Ta / W
Chemical Family:	Refractory Metal
CAS #:	7440-25-7 / 321-135-5

PHYSICAL PROPERTIES

APPEARANCE & ODOR:	Gray to bluish, hard, malleable, ductile metal, when polished metal may be silver white.
MOLECULAR WEIGHT:	N/A
BOILING POINT:	N/A
MELTING POINT:	5450-5522° F (3010-3050° C)
VAPOR PRESSURE:	N/A
VAPOR DENSITY:	N/A
SPECIFIC GRAVITY:	16.6-16.9 (water=1)
WATER SOLUBILITY:	insoluble
PH:	N/A
ODOR THRESHOLD:	N/A
EVAPORATION RATE:	N/A

HEALTH HAZARD DATA

NFPA RATINGS: (SCALE 0-4):	HEALTH=0 FIRE=0 REACTIVITY=0 (Scale 0.4)
EC CLASSIFICATION (CALCULATED):	Not determined.
EMERGENCY OVERVIEW:	May be irritating to skin and eyes. Avoid breathing dust. Avoid contact with eyes, skin and clothing. Keep container tightly closed. Wash thoroughly after handling. Use only with adequate ventilation.
MAJOR HEALTH HAZARDS:	No significant target effects reported.
PHYSICAL HAZARDS:	Dust/air mixtures may ignite or explode.
INHALATION:	Short term effects: irritation.  Long term: May cause lung damage.
SKIN CONTACT:	May cause irritation on short term effect. No information available on long term effect.
EYE CONTACT:	May cause irritation on short term effect. There is no information available on significant adverse long term effect.
INGESTION:	Short term effects: nausea, vomiting.  No information available on significant adverse long term effects.
CARCINOGEN STATUS:	OSHA = N; NTP = N; IARC = N.

EMERGENCY & FIRST AID PROCEDURES

INHALATION:	If adverse effects occur, remove to uncontaminated area. Give artificial respiration if not breathing. Get immediate medical attention.
SKIN CONTACT:	Wash skin with soap and water for a least 15 minutes while removing contaminated clothing and shoes. Get medical attention, if needed. Thoroughly clean and dry contaminated clothing and shoes before reuse.
EYE CONTACT:	Flush eyes with plenty of water for at least 15 minutes. Then get immediate medical attention.
INGESTION:	If a large amount is swallowed, get medical attention.

FIRE FIGHTING MEASURES

FIRE & EXPLOSION HAZARD:	Negligible fire and explosion hazard in bulk form. Dust/air mixtures may ignite or explode.
EXTINGUISHING MEDIA:	Use extinguishing agent appropriate for surrounding fire.
FIRE FIGHTING:	Use extinguishing agents appropriate for surrounding fire. Avoid inhalation of material or combustion by-products.
FIRE FIGHTING PROTECTIVE EQUIPMENT:	Full firefighting turn-out gear (bunker gear). Any supplied-air respirator with full facepiece and operated in a pressure-demand or other positive-pressure mode in combination with a separate escape supply. Any self-contained breathing apparatus with a full facepiece.
FLASH POINT:	No data available.
AUTOIGNITION:	No data available.
ACGIH: NIOSH: OSHA: TWA:	American Conference of Governmental Industrial Hygienists National Institute for Occupational Safety and Health Occupational Safety and Health Administration Time Weighted Average

EXPOSURE CONTROLS, PERSONAL PROTECTION

EXPOSURE LIMITS:	TANTALUM TUNGSTEN ALLOY: TANTALUM METAL AND OXIDE DUSTS (as Ta) :    5 mg/m3 OSHA TWA    5 mg/m3 ACGIH TWA    5 mg/m3 NIOSH recommended TWA:    10 mg/m3 NIOSH recommended STEL    4 mg/m3 DFG MAK TWA (inhale dust fraction)    1.5 mg/m3 DFG MAK (respirable dust fraction)    5 mg/m3 UK OES TWA (metal)    10 mg/m3 UK OES STEL (metal) Measurement method: Particulate filter; gravimetric; (NIOSH IV # 0500, nuisance dust (total). TUNGSTEN AND INSOLUBLE COMPOUNDS (as W):    5 mg/m3 OSHA TWA (vacated by 58 FR 35338, June 30, 1993)    10 mg/m3 OSHA STEL (vacated by 58 FR 35338, June 30, 1993)    5 mg/m3 ACGIH TWA    10 mg/m3 ACGIH STEL    5 mg/m3 NIOSH recommended TWA 10 hour(s)    10 mg/m3 NIOSH recommended STEL    5 mg/m3 UK OES TWA    10 mg/m3 UK OES STEL MEASUREMENT METHOD: Particulate filter; Acid; Atomic absorption spectrometry; NIOSH III #7074.
VENTILATION:	Provide local exhaust ventilation system. Ensure compliance with applicable exposure limits.
EYE PROTECTION:	Wear splash resistant safety goggles. Provide an emergency eye wash fountain and quick drench shower in the immediate work area.
EMERGENCY EYE WASH:	Where there is any possibility that an employee's eyes may be exposed to this substance, the employer should provide an eye wash fountain within the immediate work area for emergency use.
CLOTHING:	Wear appropriate chemical resistant clothing.
GLOVES:	Wear appropriate chemical resistant gloves.
RESPIRATOR:	Under conditions of frequent use or heavy exposure, respiratory protection may be needed. Respiratory protection is ranked in order from minimum to maximum. Consider warning properties before use. Any dust, mist, and fume respirator. Any air-purifying respirator with a high-efficiency particulate filter. Any powered, air-purifying respirator with a dust, mist, and fume filter. Any powered, air-purifying respirator with a high-efficiency particulate filter. For Unknown Concentrations or Immediately Dangerous to Life or Health - Any supplied-air respirator with full facepiece and operated in a pressure-demand or other positive-pressure mode in combination with a separate escape supply.  Any self-contained breathing apparatus with a full facepiece.

ACCIDENTAL RELEASE MEASURES

OCCUPATIONAL SPILL:

Collected spill material in appropriate container for disposal.

REGULATORY INFORMATION

U.S. REGULATIONS:    TSCA INVENTORY STATUS: Y TSCA 12 (b) EXPORT NOTIFICTION: Not listed. CERCLA SECTION 103 (40CFR302.4: N SARA SECTION 302 (40CFR355.30): N SARA SECTION 304 (40CFR355.40): N SARA SECTION 313 (40CFR372.65): N SARA HAZARD CATEGORIES, SARA SECTIONS 311/312 (40CFR370.21):    ACUTE: N    CHRONIC: N    FIRE: N    REACTIVE: N    SUDDEN RELEASE: N    OSHA PROCESS SAFETY (29CFR1910.119): N STATE REGULATIONS:    California Proposition 65: N EUROPEAN REGULATIONS:    EC NUMBER: Not assigned.

TOXICOLOGICAL INFORMATION

TANTALUM:	TUMORIGENIC DATA:    3760 mg/kg implant-rat TDLo
TUNGSTEN:	IRRITATION DATA:    500 mg/24 hour(s) skin-rabbit mild; 500 mg/24 hour(s) eyes-rabbit mild TOXICITY DATA:    5 gm/kg intraperitoneal - rat LD50 ACUTE TOXICITY LEVEL:     Insufficient Data. REPRODUCTIVE EFFECTS DATA: 1210 ug/kg oral-rat TDLo 35 week(s) pre pregnancy continuous; 1160 ug/kg oral-rat TDLo 30 week(s) pre pregenancy/1-20 day(s) pregnant female continuous.
HEALTH EFFECTS:	INHALATION:   ACUTE EXPOSURE:       TANTALUM: Insufficient of the metal powder in humans was without adverse effects. TUNGSTEN: May cause irritation and coughing. CHRONIC EXPOSURE:    TANTALUM: Repeated or prolonged exposure to tantalum alloys may have caused a mild fibrosis and chronic rhinitis in exposed workers and may play a role in producing "hard metal pneumoconiosis" in workers exposed to tantalum as well as other metals. TUNGSTEN: Prolonged or repeated exposure has been reported to cause pulmonary fibrosis. Intratracheal injection into the lungs of experimental animals revealed the metallic dust to be inert, with the only pulmonary effect being areas of pigmentation. One conflicting study found the dust to cause interstitial pneumonitis and bronchiolitis in guinea pigs after intratracheal injection of 50 mg a week for 3 weeks. After one year, slight residual lesions in the form of minor atrophic emphysema were present.
SKIN CONTACT:	ACUTE EXPOSURE:    TANTALUM: May cause irritation. TUNGSTEN: Application of 500 mg to the skin of rabbits caused mild irritation. May cause redness. CHRONIC EXPOSURE:    TANTALUM: No data available. TUNGSTEN: May cause dermatitis.
EYE CONTACT:	ACUTE EXPOSURE:    TANTALUM: Dusts may cause slight irritation. TUNGSTEN: Application of 500 mg to the eyes of rabbits caused mild irritation. May cause redness and conjunctivitis.
INGESTION:	ACUTE EXPOSURE:    TANTALUM: Large oral doses of tantlum compounds were well tolerated by rats indicating poor absorption. TUNGSTEN: May cause nausea, vomiting, and irritation of the gastrointestinal tract. CHRONIC EXPOSURE:    TANTALUM: Animal studies indicate absorption may occur. TUNGSTEN: When rats were fed 2%, 5% or 10% powdered tungsten in their diets, the females gained 15.4% less weight than the control females; there was no difference between tungsten-fed and control males. The sex specific effect was suggested to depend on metabolic utilization of foodstuffs. Reproductive effects have been reported in animals.

HANDLING & STORAGE

Store and handle in accordance with all current regulations and standards. Keep separated from incompatible substances.

ECOLOGICAL INFORMATION

Not available

DISPOSAL CONSIDERATIONS

Dispose in accordance with all applicable regulations.

TRANSPORT INFORMATION

LAND TRANSPORT ADR/RID: No classification assigned. AIR TRANSPORT IATA/ICAO: No classification assigned. MARITIME TRANSPORT IMDG: No classification assigned.

REGULATORY INFORMATION

US REGULATIONS:	TSCA INVENTORY STATUS	Y
	TSCA 12(b) EXPORT NOTIFICATION	Not Listed
	CERCLA SECTION 103 (40CFR302.4)	N
	SARA SECTION 302 (40CFR355.30)	N
	SARA SECTION 304 (40CFR355.40)	N
	SARA SECTION 313 (40CFR372.65)	N
	SARA HAZARD CATEGORIES, SARA SECTIONS 311/312 (40CFR370.21):
	ACUTE	N
	CHRONIC	N
	FIRE	N
	REACTIVE	N
	SUDDEN RELEASE	N
	OSHA PROCESS SAFETY (29CFR1910.119)	N
STATE REGULATIONS:
	CALIFORNIA PROPOSITION 65	N
EUROPEAN REGULATIONS:
	EC NUMBER: Not assigned.	N

MSDS SUMMARY OF CHANGES

SECTION 8

EXPOSURE CONTROLS, PERSONAL PROTECTION

Although Rembar has attempted to provide current and accurate information herein, Rembar makes no representations regarding the accuracy or completeness of the information and assumes no liability for any loss, damage or injury of any kind which may result from or arise out of the use of or reliance on the information by any person.

MSDS : | Molybdenum | Tungsten | Tantalum | Ta/W | Rhenium | Niobium |