Hi Suzy,
On Fri, 17 Nov 2000 21:02:54 EST, [email protected] wrote:
>Checked the CDC website at www.cdc.gov for colloidal silver (nothing), and
>silver chloride, and found 4 documents, as follows: (the information was
>technical beyond my understanding, but perhaps will help someone here.) suzy
>CDC Search Results List
Yup. You'll find data on toxicity for lots of silver *compounds* and
airborne silver dust. But not silver metal -- especially colloidal
silver.
Here's the data from one toxicity site: Comments in brackets [] are
mine.
****************************************
NTP CHEMICAL REPOSITORY SILVER
-IDENTIFIERS
===========
*CATALOG ID NUMBER: 001228
*CAS NUMBER: 7440-22-4
*BASE CHEMICAL NAME: SILVER
*PRIMARY NAME: SILVER
*CHEMICAL FORMULA: Ag
*STRUCTURAL FORMULA:
*WLN: AG
*SYNONYMS:
ARGENTUM
C.I. 77870
L-3
SHELL SILVER
SILVER ATOM
-PHYSICAL CHEMICAL DATA
======================
*PHYSICAL DESCRIPTIONS: Literature: White metal, face-centered cubic
structure
*MOLECULAR WEIGHT: 107.93
*SPECIFIC GRAVITY: 10.50 at 20 C degrees
*DENSITY:Not available [????]
*MP (DEG C): 961.93
*BP (DEG C): 2212
*SOLUBILITIES:
WATER : Not available
DMSO : Not available
95% ETHANOL : Not available
METHANOL : Not available
ACETONE : Not available
TOLUENE : Not available
OTHER SOLVENTS:
Water: Insoluble
Nitric acid (HNO3): Soluble
Sulfric acid (hot, H2SO4): Soluble
Potassium cyanide (KCN): Soluble
Alkali: Insoluble
*VOLATILITY : Vapor pressure: 1 mm at 1357 C degree
*FLAMMABILITY(FLASH POINT): Dust is flammable.
*UEL: Not available LEL: Not available
*REACTIVITY:
Blackened by ozone, sulfur and hydrogen sulfide. Readily reacts with
dilute nitric acid and hot concentrated sulfuric acid. Superficially
attacked by hydrochloric acid. Most silver salts are light sensitive.
Inert to most acids.
*STABILITY: Fairly stable compound.
*OTHER PHYSICAL DATA: Specfic gravity: 10.53
-TOXICITY
========
*NIOSH REGISTRY NUMBER: VW3500000
*TOXICITY: (abbreviations)
typ. dose mode specie amount unit other
TCLo ihl hmn 1 mg/m3 TFX:SKN
*AQTX/TLM96: Not available
*SAX TOXICITY EVALUATION: THR: An experimental heoplasma via
implantation rout
*CARCINOGENICITY:
Tumorigenic Data:
TDLo: mul-rat 330 mg/k3/43W-I
TDLo: imp-rat 2400 mg/kg
TDLo: imp-mus 11 mg/kg
TD : imp-rat 2570 mg/kg
[Notice the extreme amounts needed]
*MUTAGENICITY: Not available
*TERATOGENICITY: Not available
*STANDARDS, REGULATIONS & RECOMMENDATIONS:
OSHA: Federal Register (1/19/89) and 29 CFR 1910.1000 Subpart Z
Transitional Limit: PEL-TWA 0.01 mg(Ag)/m3 [610]
Final Limit: PEL-TWA 0.01 mg(Ag)/m3 [610]
ACGIH: TLV-TWA 0.1 mg(Ag)/m3 [610]
NIOSH Criteria Document: None
NFPA Hazard Rating: Health (H): None [No Health hazards for silver]
Flammability (F): None
Reactivity (R): None
*OTHER TOXICITY DATA:
Review: Toxicology Review-5
Status: "NIOSH Manual of Analytical Methods" Vol. 5, #173, 5, #182
Reported in EPA TSCA Inventory, 1980
-OTHER DATA (Regulatory)
=======================
*PROPER SHIPPING NAME (IATA): Not restricted
*UN/ID NUMBER:
*HAZARD CLASS: SUBSIDIARY RISK: PACKING GROUP:
*LABELS REQUIRED:
*PACKAGING: PASSENGER: PKG. INSTR.: MAXIMUM QUANTITY:
CARGO : PKG. INSTR.: MAXIMUM QUANTITY:
*SPECIAL PROVISIONS:
*USES:
For coinage, most frequently alloyed with copper or gold.
For manufacting of tableware, mirrors, jewelry and ornaments.
For making vessels and appatatus used in manufacting medical
chemicals.
For electroplating, processing foods and beverages and organic acids.
For a catalyst in hydrogenation and oxidation processes.
For ingredient of dental alloys.
Purification of drinking water because of toxicity to bacteria and
lower forms of life.
Some salts used in photography.
*COMMENTS:
Silver compounds may be irritant to skin and mucus membrane. [Note:
compounds, not the pure metal.]
Soft dutile, mallible and lustrous metal.
-HANDLING PROCEDURES
===================
*ACUTE/CHRONIC HAZARDS:
Fire hazard: Moderate in the form of dust when exposed to flame or
by chemical reaction with C2H2, NH3, CIF3, H2O2, H2SO4, bromoazide,
ethyleneimine, oxalic acid and tartaric acid.
Radiation hazard: Possible; see reactivity.
*MINIMUM PROTECTIVE CLOTHING: Not available
*OTHER: Not available
*STORAGE PRECAUTIONS:
You should store this chemical in a freezer and away from all mineral
acids and bases. [This must be comic relief.]
*DISPOSAL AND WASTE TREATMENT: Can resell as scrap metal.
-EMERGENCY PROCEDURES
====================
*SYMPTOMS:
Does not cause serious toxic manifestations, but prolonged absorption
of silver compounds can lead to grayish blue discoloration of skin
known as argyria or argyrosis. Salts are irritating to skin and mucus
membranes. Inhalation of dust should be avoided. [Note: Again,
silver compounds are referenced, not silver metal.]
*FIREFIGHTING:
A fire in your laboratory involving this chemical should be
extinguished with a dry chemical, carbon dioxide or halon
extinguisher. [More comic relief.]
-SOURCES
=======
*SOURCES:
Occupational Safety and Health Administration. Tentative
OSHA Listing of Confirmed and Suspected Carcinogens by
Category. Occupational Safety and Health Administration.
Washington, DC. 1979. Listed
Aldrich Chemical Company. Aldrich Catalog/Handbook of Fine
Chemicals. Aldrich Chemical Co., Inc. Milwaukee, WI.
1980. p. 840, 20,436-6
Oak Ridge National Laboratory. Environmental Teratogen Information
Center (ETIC), Bibliographic Data Base. Oak Ridge National
Laboratory. Oak Ridge, TN. Listed
Oak Ridge National Laboratory. Environmental Mutagen Information
Center (EMIC), Bibliographic Data Base. Oak Ridge National
Laboratory. Oak Ridge, TN. Listed
Steere, N.V., Ed. Handbook of Laboratory Safety. 2nd Ed.
CRC Press, Inc. Cleveland, OH. 1971. p. 812-3, 913
U.S. Environmental Protection Agency, Office of Toxic Substances.
Toxic Substances Control Act Chemical Substances Inventory,
Initial Inventory. 6 Vols. U.S. Environmental Protection
Agency. Washington, D.C. 1979. Listed
Proctor, N.H. and J.P. Hughes. Chemical Hazards of the Workplace.
J.B. Lippincott. Philadelphia. 1978. p. 442-3
Hawley, G.G., Ed. The Condensed Chemical Dictionary. 10th Ed.
Van Nostrand Reinhold. New York. 1981. p. 913
International Technical Information Institute. Toxic and
Hazardous Industrial Chemicals Safety Manual for Handling
and Disposal with Toxicity and Hazard Data. International
Technical Information Institute. 1978. p. 464, 571
Sax, N.I. Dangerous Properties of Industrial Materials. 5th Ed.
Van Nostrand Reinhold. New York. 1979. p. 970
Windholz, M., Ed. The Merck Index. 9th Ed. Merck and Co.
Rahway, NJ. 1976. p. 1100, 8244
Weast, R.C. and M.A. Astle, Eds. CRC Handbook of Chemistry
and Physics. 60th Ed. CRC Press, Inc. Boca Raton, FL.
1982. b-122, s-124
Lewis, R.J., Sr. and R.L. Tatken, Eds. Registry of Toxic
Effects of Chemical Substances. DHEW (NIOSH) Publication
No. 79-100. National Institute for Occupational Safety
and Health. Cincinnati, OH. 1979. VW3500000
[610] Clansky, Kenneth B., Ed. Suspect Chemicals Sourcebook: A
Guide to Industrial Chemicals Covered Under Major Federal Regulatory
and Advisory Programs. Roytech Publications, Inc. Burlingame, CA.
1990. Section 3, p. 111.
[620] United States National Toxicology Program. Chemical Status
Report. NTP Chemtrack System. Research Triangle Park, NC. November
6, 1990. Not listed.
-------------------------------------------------------------
-- Dean -- from (almost) Duh Moyn (CDP, KB0ZDF)
--
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