YTTRIUM †

Chemical Identification
Chemical Identification
CAS # 7440-65-5
Formula

Y

Synonyms

yttrium metal

Physical Properties
Physical Properties
Physical description Dark-gray to black, odorless powder. Soft silvery-white metal in bulk.
Boiling point 5301°F Molecular weight 88.9
Freezing point/melting point 2732°F Vapor pressure 0 mmHg (approx)
Flash point Vapor density
Specific gravity 4.47 Ionization potential
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating NFPA fire rating
NFPA reactivity rating NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 2602
Sampling group
Sampler/Sampling media Pre-assembled cassette with mixed cellulose ester filter (MCEF) 0.8 micron (25 or 37 mm) [MAWP025A0 or MAWP037A0]
Sampling time*

240-480 min

Sampling volume (TWA)*

480-960 L

Sampling flow rate (TWA)*

2 L/min

Sampling volume (STEL/Peak/C)*

10-30 L

Sampling flow rate (STEL/Peak/C)*

2 L/min

Analytical method instruments AAS/AES
Method reference OSHA ID-121 (fully validated)
Notes

Submit as a separate sample. If the filter is not overloaded, samples may be collected up to an 8-hour period.

Special requirements

* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Wipe Method
Wipe Method
Sampler/Sampling media

Wipe with Whatman smear tab. [WHA1450993]

Bulk Method
Bulk Method

Available

On-Site Screening Techniques
On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)
Exposure Limits
Exposure Limits
OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
NIOSH REL
Up to 10-hour TWA
(ST) STEL
(C) Ceiling
ACGIH TLV©
8-hour TWA
(ST) STEL
(C) Ceiling
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA

1 mg/m³

REL-TWA

1 mg/m³

TLV-TWA

1 mg/m³ [1986]

PEL-TWA

1 mg/m³

PEL-STEL REL-STEL TLV-STEL PEL-STEL
PEL-C REL-C TLV-C PEL-C
Skin notation

N

Skin notation

N

Skin notation

N

Skin notation

N

Notes:

See 29 CFR 1910.1000 Table Z-1.

Notes: Notes: Notes:
Health factors:  See NIH-NLM PubChem. IDLH

500 mg/m³

Carcinogenic classifications: Not listed Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - Yttrium

NIOSH: Pocket Guide to Chemical Hazards - Yttrium

Literature References

  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Yttrium. See annual publication for most recent information.

Last Updated Date : 01/14/2021