SDS No. M0001
Effective Date: 02/12/2015
(a) Product identifier used on the labelFIBERFRAX® CERAMIC FIBER PRODUCTS
(b) Other means of identificationFIBERS
FIBERFRAX® HIGH PURITY FIBERS: HP-ODB; Module Trim; MT-HP; HP-Chopped; H Bulk; Regular Bulk, Spun Bulk, Fiberfrax FPP Fiber.
FIBERFRAX® 6000 SERIES FIBERS: All bulk fibers from 6000-AAA to 6100-ZZZ, 6900-70A to 6900-99Z.
FIBERFRAX® 7000 SERIES FIBERS: 7000-AA to 7100-ZZ.
FIBERFRAX® MILLED FIBERS: EF-119; HP Ball Milled A; HP Ball Milled B; HP Ball Milled C/D
FIBERFRAX® HIGH INDEX FIBERS: W-657; W-707; W-758; HS-95C; MX-135-CW; MX-400-CW; HS-70; HS-70C.

Durablanket® AC; Durablanket® HP; Durablanket® HP-S; Durablanket® S; Durablanket® Strip; Tank Car Insulation; TCB; QSB600; QSB800; FIBERMAT®; LO-CON™ BLANKET, Fiberfrax® SP Mat
FIBERFRAX® BINDERLESS PAPERS: 972-AH; 972-FH; 972-JH; 882-FH; 882-JH; HSA-F without binder; HSA-J without binder.
(c) Recommended use of the chemical and restrictions on use· Primary Use: Refractory Ceramic Fiber (RCF) materials are used primarily in industrial high temperature insulating applications. Examples include heat shields, heat containment, gaskets, expansion joints, industrial furnaces, ovens, kilns, boilers and other process equipment at applications up to 1400°C. RCF based products are not intended for direct sale to the general public. While RCFs are used in the manufacture of some consumer products, such as catalytic converter mats and wood burning stoves, the materials are contained, encapsulated, or bonded within the units.

· Secondary Use: Conversion into wet and dry mixtures and articles (refer to section 8).

· Tertiary Use: Installation, removal (industrial and professional) / Maintenance and service life (industrial and professional) (refer to section 8).

Uses Advised Against
Spraying of dry product.
d) Name, address, and telephone numberUnifrax I LLC
600 Riverwalk Parkway, Suite 120
Tonawanda, NY 14150
Product Stewardship Information Hotline
1-800-322-2293 (Monday - Friday 8:00 a.m. - 4:30 p.m. EST)
For additional SDSs, visit our web page, http: // or call Unifrax Customer Service at (716) 768-6500
(e) Emergency Phone Number:CHEMTREC will provide assistance for chemical emergencies. Call 1-800-424-9300
(a) Classification of the chemical in accordance with paragraph (d) of §1910.1200
(b) Signal word, hazard statement(s), symbol(s) and precautionary statement(s) in accordance with paragraph (f) of §1910.1200

(c) Describe any hazards not otherwise classified that have been identified during the classification process
(d) Mixture rule
(a) Chemical and (b) Common Name(c) CAS Number
Refractories, Fibers, Aluminosilicate142844-00-6
*Synonyms: RCF, ceramic fiber, Alumino Silicate Wool (ASW), synthetic vitreous fiber (SVF), man-made vitreous fiber (MMVF), man-made mineral fiber (MMMF), high temperature insulation wool (HTIW)

(d) Impurities and stabilizing additives
Not applicable.


(a) Description of necessary measures, subdivided according to the different routes of exposure, i.e., inhalation, skin and eye contact, and ingestion
(b) Most important symptoms/effects, acute and delayed

(c) Indication of immediate medical attention and special treatment needed, if necessary

(a) Suitable (and unsuitable) extinguishing media

(b) Specific hazards arising from the chemical (e.g., nature of any hazardous combustion products):
(c) Special protective equipment and precautions for fire-fighters

(a) Personal precautions, protective equipment, and emergency procedures (b) Methods and materials for containment and cleaning up


(a) Precautions for safe handling (b) Conditions for safe storage, including any incompatibilities
(a) OSHA permissible exposure limit (PEL), American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV), and any other exposure limit used or recommended by the chemical manufacturer, importer, or employer preparing the safety data sheet, where available

Refractory Ceramic Fiber (RCF)None established*0.5 f/cc, 8-hr. TWA0.2 f/cc TLV, 8-hr. TWA0.5 f/cc, 8-hr. TWA**

*Except for the state of California, where the PEL for RCF is 0.2 f/cc 8-hr TWA, there is no specific regulatory standard for RCF in the U.S. OSHA’s “Particulate Not Otherwise Regulated (PNOR)” standard [29 CFR 1910.1000, Subpart Z, Air Contaminants] applies generally - Total Dust Total Dust 15 mg/m³; Respirable Fraction 5 mg/m³.

**In the absence of an OSHA PEL, HTIW Coalition has adopted a recommended exposure guideline (REG), as measured under NIOSH Method 7400 B. For further information on the history and development of the REG see “Rationale for the Recommended Exposure Guideline” at page 34 of the HTIW Coalition Product Stewardship Program .

OTHER OCCUPATIONAL EXPOSURE LEVELS (OEL) RCF-related occupational exposure limits vary internationally. Regulatory OEL examples include: California, 0.2 f/cc; Canadian provincial OELs ranging from 0.2 to 1.0 f/cc. The objectives and criteria underlying each of these OEL decisions also vary. The evaluation of occupational exposure limits and determining their relative applicability to the workplace is best performed, on a case-by-case basis, by a qualified Industrial Hygienist.

(b) Appropriate engineering controls

(c) Individual protection measures, such as personal protective equipment

(a) AppearanceWhite, fibrous wool(j) Upper/lower flammability or explosive limitsNot applicable
(b) OdorOdorless(k) Vapor pressureNot applicable
(c) Odor thresholdNot applicable(l) Vapor densityNot applicable
(d) pHNot applicable(m) Relative density2.50 – 2.75
(e) Melting point1760° C (3200° F)(n) SolubilityInsoluble
(f) Initial boiling point and boiling rangeNot applicable(o) Partition coefficient: n-octanol/waterNot applicable
(g) Flash pointNot applicable(p) Auto-ignition temperatureNot applicable
(h) Evaporation rateNot applicable(q) Decomposition temperatureNot applicable
(i) FlammabilityNot applicable(r) ViscosityNot applicable


(a) ReactivityRCF is non-reactive.
(b) Chemical stabilityAs supplied RCF is stable and inert.
(c) Possibility of hazardous reactionsNone
(d) Conditions to avoidPlease refer to handling and storage advice in Section 7
(e) Incompatible materialsNone
(f) Hazardous decomposition productsNone.

For more details on scientific publications referenced in this SDS see

(a) through (d)


Basic Toxicokinetics
Exposure is predominantly by inhalation or ingestion. Man-made vitreous fibers of a similar size to RCF have not been shown to migrate from the lung and/or gut and do not become located in other organs of the body.

Human Toxicological Data/Epidemiology Data
In order to determine possible human health effects following RCF exposure, the University of Cincinnati has been conducting medical surveillance studies on RCF workers in the U.S.A; this epidemiological study has been ongoing for 25 years and medical surveillance of RCF workers continues. The Institute of Occupational Medicine (IOM) has conducted medical surveillance studies on RCF workers in European manufacturing facilities.

Pulmonary morbidity studies among production workers in the U.S.A. and Europe have demonstrated an absence of interstitial fibrosis. In the European study a reduction of lung capacity among smokers has been identified, however, based on the latest results from a longitudinal study of workers in the U.S.A. with over 17-year follow-up, there has been no accelerated rate of loss of lung function (McKay et al. 2011).

A statistically significant correlation between pleural plaques and cumulative RCF exposure was evidenced in the U.S.A. longitudinal study.

The U.S.A. mortality study showed no excess mortality related to all deaths, all cancer, or malignancies or diseases of the respiratory system including mesothelioma (LeMasters et al. 2003).

Information on Toxicological Effects

· Acute toxicity: short term inhalation

· Acute toxicity: oral
· Skin corrosion/irritation
· Serious eye damage/irritation
· Respiratory or skin sensitization
· Germ cell mutagenicity/genotoxicity · Carcinogenicity
· Reproductive toxicity · STOT-Single exposure · STOT-Repeated exposure · Aspiration hazard See the following review publications for a summary and discussion:
Interpretation of these animal experiments is complex and there is not complete agreement amongst scientists internationally. A summary of the evidence relating to RCF carcinogenicity in vivo can be found in SCOEL/SUM/165 and in Utell and Maxim 2010.

Other information
Numerous studies indicate the relevance of biopersistence as a determinant of toxic effects of fiber exposure. (Maxim et al 2006). Irritant Properties

Negative results have been obtained in animal studies (EU method B 4) for skin irritation. Inhalation exposures using the nose only route produce simultaneous heavy exposures to the eyes, but no reports of excess eye irritation exist. Animals exposed by inhalation similarly show no evidence of respiratory tract irritation.

Human data confirm that only mechanical irritation, resulting in itching, occurs in humans. Screening at manufacturers’ plants in the UK has failed to show any human cases of skin conditions related to fiber exposure.

(e) International Agency for Research on Cancer and National Toxicology Program

Not classified by OSHA.


(a) Ecotoxicity (aquatic and terrestrial, where available)No known aquatic toxicity.
(b) Persistence and degradabilityThese products are insoluble materials that remain stable over time and are chemically identical to inorganic compounds found in the soil and sediment; they remain inert in the natural environment.
(c) Bioaccumulative potentialNo bioaccumulative potential.
(d) Mobility in soilNo mobility in soil.
(e) Other adverse effects (such as hazardous to the ozone layer)No adverse effects of this material on the environment are anticipated.



To prevent waste materials from becoming airborne during waste storage, transportation and disposal, a covered container or plastic bagging is recommended.


This product, as manufactured, is not classified as a hazardous waste according to Federal regulations (40 CFR 261). Any processing, use, alteration or chemical additions to the product, as purchased, may alter the disposal requirements. Under Federal regulations, it is the waste generator's responsibility to properly characterize a waste material, to determine if it is a "hazardous" waste. Check local, regional, state or provincial regulations to identify all applicable disposal requirements.


(a) UN numberNot Applicable
(b) UN proper shipping nameNot Applicable
(c) Transport hazard class(es)Not Applicable
(d) Packing group, if applicableNot Applicable
(e) Environmental hazards (e.g., Marine pollutant (Yes/No))Not a marine pollutant
(f) Transport in bulk (according to Annex II of MARPOL 73/78 and the IBC Code)Not Applicable
(g) Special precautions which a user needs to be aware of, or needs to comply with, in connection with transport or conveyance either within or outside their premisesNot Applicable

Canadian TDG Hazard Class & PIN: Not regulated

Not classified as dangerous goods under ADR (road), RID (train) or IMDG (ship).



EPASuperfund Amendments and Reauthorization Act (SARA) Title III - this product does not contain any substances reportable under Sections 302, 304, 313, (40 CFR 372). Sections 311 and 312 (40 CFR 370) apply (delayed hazard).
Hazard Categories: Immediate Hazard – No
          Delayed Hazard – Yes
          Fire Hazard – No
          Pressure Hazard – No
          Reactivity Hazard - No
Toxic Substances Control Act (TSCA) - RCF is not required to be listed on the TSCA inventory.
Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) and the Clean Air Act (CAA) - this product contains fibers with an average diameter greater than one micron and thus is not considered a hazardous air pollutant.
OSHAComply with Hazard Communication Standards 29 CFR 1910.1200 and 29 CFR 1926.59 and the Respiratory Protection Standards 29 CFR 1910.134 and 29 CFR 1926.103.
California“Ceramic fibers (airborne particles of respirable size)” is listed in Proposition 65, The Safe Drinking Water and Toxic Enforcement Act of 1986 as a chemical known to the State of California to cause cancer.
Other StatesRCF products are not known to be regulated by states other than California; however, state and local OSHA and EPA regulations may apply to these products. If in doubt, contact your local regulatory agency.


Canada Canadian Workplace Hazardous Materials Information System (WHMIS) – Classified as Class D2A – Materials Causing Other Toxic Effects
Canadian Environmental Protection Act (CEPA) - All substances in this product are listed, as required, on the Domestic Substance List (DSL)

Europe Integration of RCF into ANNEX XV of the REACH Regulation

RCF is classified under the CLP (classification, labelling and packaging of substances and mixtures) regulation as a category 1B carcinogen. On January 13, 2010 the European Chemicals Agency (ECHA) updated the candidate list for authorization (Annex XV of the REACH regulation) and added 14 new substances in this list including aluminosilicate refractory ceramic fibers.

As a consequence, EU (European Union) or EEA (European Economic Area) suppliers of articles which contain aluminosilicate refractory ceramic fibers in a concentration above 0.1% (w/w) have to provide sufficient information, available to them, to their customers or upon requests to a consumer within 45 days of the receipt of the request. This information must ensure safe use of the article, and as minimum contains the name of the substance.


Product Stewardship Program

Unifrax I LLC has established a program to provide customers with up-to-date information regarding the proper use and handling of refractory ceramic fiber. In addition, Unifrax has also established a program to monitor airborne fiber concentrations at customer facilities. If you would like more information about this program, please call the Product Stewardship Information Hotline at 1-800-322-2293.

In 2002, OSHA endorsed a five year voluntary product stewardship program called PSP 2002. On May 23, 2007, HTIW Coalition's predecessor, RCFC, and its member companies renewed this voluntary product stewardship agreement with OSHA. On April 16, 2012, HTIW Coalition renewed this agreement.

This new five year program, called PSP 2012, continues and builds upon the earlier programs. PSP 2012 is a highly acclaimed, multifaceted strategic risk management initiative designed specifically to reduce workplace exposures to refractory ceramic fiber (RCF). For more information regarding PSP 2012, please visit

Hazardous Materials Identification System (HMIS) Hazard Rating

HMIS Health 1* (* denotes potential for chronic effects)
HMIS Flammability 0
HMIS Reactivity 0
HMIS Personal Protective Equipment X (To be determined by user)

Additional Information on After Service Material

As produced, all RCF fibers are vitreous (glassy) materials which do not contain crystalline silica. Continued exposure to elevated temperatures may cause these fibers to devitrify (become crystalline). The first crystalline formation (mullite) begins to occur at approximately 985° C (1805° F). Crystalline phase silica may begin to form at approximately 1100° C (2012° F). When the glass RCF fibers devitrify, they form a mixed mineral crystalline silica containing dust. The crystalline silica is trapped in grain boundaries within a matrix predominately consisting of mullite. The occurrence and extent of crystalline phase formation is dependent on the duration and temperature of exposure, fiber chemistry and/or the presence of fluxing agents or furnace contaminants. The presence of crystalline phases can be confirmed only through laboratory analysis of the "hot face" fiber.

IARC’s evaluation of crystalline silica states “Crystalline silica inhaled in the form of quartz or cristobalite from occupational sources is carcinogenic to humans (Group 1)” and additionally notes “carcinogenicity in humans was not detected in all industrial circumstances studied.” IARC also studied mixed mineral crystalline silica containing dusts such as coal dusts (containing 5 – 15 % crystalline silica) and diatomaceous earth without seeing any evidence of disease. (IARC Monograph Vol. 68, 1997). NTP lists all polymorphs of crystalline silica amongst substances which may "reasonably be anticipated to be carcinogens". IARC and NTP did not evaluate after-service RCF, which may contain various crystalline phases. However, an analysis of after-service RCF samples obtained pursuant to an exposure monitoring agreement with the USEPA, found that in the furnace conditions sampled, most did not contain detectable levels of crystalline silica. Other relevant RCF studies found that (1) simulated after-service RCF showed little, or no, activity where exposure was by inhalation or by intraperitoneal injection; and (2) after-service RCF was not cytotoxic to macrophage-like cells at concentrations up to 320 micrograms/cm² - by comparison, pure quartz or cristobalite were significantly active at much lower levels (circa 20 micrograms/cm²).


ACGIH:American Conference of Governmental Industrial Hygienists
ADR:Carriage of Dangerous Goods by Road (International Regulation)
CAA:Clean Air Act
CAS:Chemical Abstracts Service
CERCLA:Comprehensive Environmental Response, Compensation and Liability Act
DSL:Domestic Substances List
EPA:Environmental Protection Agency
EU:European Union
f/cc:Fibers per cubic centimeter
HEPA:High Efficiency Particulate Air
HMIS:Hazardous Materials Identification System
IARC:International Agency for Research on Cancer
IATA:International Air Transport Association
IMDG:International Maritime Dangerous Goods Code
mg/m³:Milligrams per cubic meter of air
mmpcf: Million particles per cubic meter
NFPA:National Fire Protection Association
NIOSH:National Institute for Occupational Safety and Health
OSHA:Occupational Safety and Health Administration
29 CFR 1910.134 & 1926.103:OSHA Respiratory Protection Standards
29 CFR 1910.1200 & 1926.59:OSHA Hazard Communication Standards
PEL:Permissible Exposure Limit (OSHA)
PIN:Product Identification Number
PNOC:Particulates Not Otherwise Classified
PNOR:Particulates Not Otherwise Regulated
PSP:Product Stewardship Program
RCRA:Resource Conservation and Recovery Act
REL:Recommended Exposure Limit (NIOSH)
RID:Carriage of Dangerous Goods by Rail (International Regulations)
SARA:Superfund Amendments and Reauthorization Act
SARA Title III:Emergency Planning and Community Right to Know Act
SARA Section 302:Extremely Hazardous Substances
SARA Section 304:Emergency Release
SARA Section 311:MSDS/List of Chemicals and Hazardous Inventory
SARA Section 312:Emergency and Hazardous Inventory
SARA Section 313:Toxic Chemicals and Release Reporting
STEL:Short Term Exposure Limit`
SVF:Synthetic Vitreous Fiber
TDG:Transportation of Dangerous Goods
TLV:Threshold Limit Value (ACGIH)
TSCA:Toxic Substances Control Act
TWA:Time Weighted Average
WHMIS:Workplace Hazardous Materials Information System (Canada)

Revision Summary: Updated SDS to align with OSHA HCS 2012. Replaces 09/24/2014 SDS.
Revison Date: 02/12/2015



The information presented herein is presented in good faith and believed to be accurate as of the effective date of this Safety Data Sheet. Employers may use this SDS to supplement other information gathered by them in their efforts to assure the health and safety of their employees and the proper use of the product. This summary of the relevant data reflects professional judgment; employers should note that information perceived to be less relevant has not been included in this SDS. Therefore, given the summary nature of this document, Unifrax I LLC does not extend any warranty (expressed or implied), assume any responsibility, or make any representation regarding the completeness of this information or its suitability for the purposes envisioned by the user.