Label abbreviations descriptions

MINERAL WOOL FIBER†

Chemical Identification
CAS # NO CAS
Formula
Synonyms

manmade mineral fibers; rock wool; slag wool; synthetic vitreous fibers

Physical Properties
Physical description Produced by blowing steam or air through molten rock (rock wool) or various furnace slags that are by-products of metal smelting or refining processes (slag wool).
Boiling point Molecular weight
Freezing point/melting point Vapor pressure 0 mmHg (approx)
Flash point Vapor density
Specific gravity 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
Analyte code (IMIS no.) 9130 (respirable - not recommended), 9135 (total) 1300
Sampling group
Sampler/Sampling media Tared low-ash 37 mm PVC filter, 5 microns [SLTC108] Mixed cellulose ester filter (MCEF) 0.8 microns (25 mm), with electrically conductive 50 mm extension cowl [GCS25080]
Sampling time*
 

30-480 min (120 recommended)
Sampling volume (TWA)*
 

25-2400 L
Sampling flow rate (TWA)*
 

 
 

0.5-16 L/min - NIOSH (0.5-5 L/min recommended)
Sampling volume (STEL/Peak/C)*
 

 
 
 

 
Sampling flow rate (STEL/Peak/C)*
 

 
 

 
Analytical method instruments Gravimetric PCM
Method reference OSHA PV2121 (partially validated) NIOSH 7400 (fully validated), Alternate or B rules
Notes

See PARTICULATES NOT OTHERWISE REGULATED (PNOR). DO NOT USE CYCLONE FOR MINERAL WOOL
 
 

1. Adjust to give 100-1300 fiber/mm²

2. Fiber count method is used for sampling in industries participating in voluntary NAIMA Partnership or HTIW partnership programs, or for other as noted.

3. Exposure limit for NAIMA is 1 f/cc

4. Do not request multiple analytes. Do not overload. If dust is high, reduce air volume to avoid overloading.

5. A minimum of 2 blanks or 10% of the number of samples are required for every set.
Special requirements
 

 
 
 

Filter material must be certified for asbestos analysis. Do not allow samples to be loose in mailing packaging. See 29 CFR 1910.1001, Appendix A.

* 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.

Bulk/Wipe Method
Wipe Sampler/Sampling media
 
 

 
Bulk Method
 
 

 

On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)

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
 
 

15 mg/m³ (total dust), 5 mg/m³ (respirable dust)

 REL-TWA
 
 

3 fibers/cm³ (fibers with diameter ≤3.5 µm & length ≥10 µm); 5 mg/m³ (total)

 TLV-TWA
 
 

1 f/cc (respirable fibers: length >5 µm; aspect ratio ≥3:1, as determined by the membrane filter method at 400-450X magnification (4-mm objective), using phase-contrast illumination) [1999]

 PEL-TWA
 
 

10 mg/m³ (total dust); 5 mg/m³ (respirable fraction)
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:
 
 

as Inert or Nuisance Dust, see 29 CFR 1910.1000 Table Z-3, Mineral Dusts.

 Notes:
 
 

 

 Notes:
 
 

TLV for slag wool fibers

 Notes:
 
 

as Particulates not otherwise regulated; see footnote [n]
Health factors:  See NIH-NLM PubChem. IDLH
Carcinogenic classifications: TLV-A3 Notes:
 
 

 
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
 
 

 

Additional Resources and Literature References

Last Updated Date : 01/05/2021