Label abbreviations descriptions

REFRACTORY CERAMIC FIBERS†

Chemical Identification
CAS #
Formula
Synonyms

Physical Properties
Physical description
Boiling point Molecular weight
Freezing point/melting point Vapor pressure
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.) 9135 (total dust) R251
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*

240-480 min

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

960 L

25-2400 L
Sampling flow rate (TWA)*

2 L/min

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

408-960 L
Sampling flow rate (STEL/Peak/C)*

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

1. The OSHA PEL is gravimetric. 2. If the net weight of the sample yields a concentration below the PEL after considering the associated SAE, the SLTC will perform no further work on the sample and the sample air concentration will be reported as the calculated gravimetric air concentration. If the net weight corresponds to an amount greater than the PEL value after considering the associated SAE, the sample may be analyzed for the applicable component and appropriate results will be reported. 

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 HTIW is 0.5 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

FOR TOTAL DUST SAMPLES, DO NOT USE A CYCLONE!!

Filter material must be certified for asbestos analysis.

* 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

Wipe sampling is not recommended - Contact SLTC if there is a question.
Bulk Method

See OSHA ID-191. Take samples using 20 mL scintillation vials. Do not use plastic bags. Send to SLTC in separate packaging from air samples.

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 or 50 mppcf (total dust), 5 mg/m³ or 15 mppcf (respirable fraction)

 REL-TWA

0.5 f/cm³

 TLV-TWA

0.2 f/cc [1999]

 PEL-TWA

0.2 f/cc(q)
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:

*mppcf= millions of particles per cubic foot of air. See 29 CFR 1910.1000 Table Z-1 (PNOR) and 29 CFR 1910.1000 Table Z-3, Mineral Dusts (Inert or Nuisance Dust). OSHA Construction and Maritime PEL for PNOR (total dust, organic and inorganic): 15 mg/m³ as an 8 hr TWA. See 29 CFR 1926.55 Table 1 and 29 CFR 1915.1000 Table Z-Shipyards. [Note: Includes all inert or nuisance dusts, whether mineral, inorganic, not listed specifically in 29 CFR 1910.1000.

 Notes:

See NIOSH's Criteria for a Recommended Standard: Occupational Exposure to Refractory Ceramic Fibers, 2006.

 Notes:

See footnote (F) of ACGIH TLV for additional information.

 Notes:

(q) Fibers per cubic centimeter of air at 25°C and 760mm Hg pressure. To be considered a fiber for this limit the glass particle must be longer than 5µm, have a length to diameter ratio of three or more, and have a diameter less than 3µm. The National Institute for Occupational Safety and Health (NIOSH), Method 7400, Issue 2, August 15, 1994, which is hereby incorporated by reference, shall be used for measuring airborne fiber concentrations.
Health factors:  See NIH-NLM PubChem. IDLH
Carcinogenic classifications: IARC-2B, TLV-A2 Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

Last Updated Date : 06/23/2023