EMS CATALOG NO: 12630
DATE:   02/24/97
EMS PRODUCTS: Colloidal Silver 
PAGE NUMBER: One of 4


MATERIAL SAFETY DATA SHEET

The information contained herein is based on data considered
accurate. However, no warranty is expressed or implied
regarding the accuracy of these data or the results to be
obtained from the use thereof.

Electron Microscopy Sciences assumes no responsibility for
personal injury or property damage to vendees, users or
third parties caused by the material. Such vendees or users
assume all risks associated with the use of the material.


ELECTRON MICROSCOPY SCIENCES
321 MORRIS ROAD
P.O. BOX 251
FORT WASHINGTON, PA 19034 24 HOUR EMERGENCY PHONE NUMBER
(215) 646-1566 CHEMTREC: (800) 424-9300
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FOR PRODUCT AND SALES INFORMATION
_________________________________________________________________

CONTACT ELECTRON MICROSCOPY SCIENCES OFFICE ABOVE.

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PRODUCT IDENTIFICATION
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PRODUCT NAME: Colloidal Silver

CAS NUMBER: N/A (product is a mixture)
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COMPONENT HAZARD DATA _________________________________________________________________

HAZARDOUS COMPONENT: %: CAS NO:  EXPOSURE LIMITS

Silver 59-61 7440-22-4 0.01 mg/m3 OSHA (1)
Isopropyl Alcohol 20-35 67-63-0 400 ppm ACGIH
Methyl Ethyl Ketone 10-15 78-93-3  200 ppm ACGOH
Ethyl Acetate  2-10 141-78-6 400 ppm ACGIH

(1) TLV very unlikely to be reached since material is in paste form;
hence no airborne particles. Provide adequate ventilation in firing
room to remove any evolved fumes.
* * * EMS CATALOG NO: 12630 * * * (Page 2 of 4)

* Per 29 CFR 1910 the mixture has NOT been tested as a whole. All
hazardous components which comprise >= 1% of the mixture (0.1% if
carcinogenic) are listed. Percentages of individual components 
are not listed as this information is considered a trade secret; 
it is not required that it be disclosed.
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PHYSICAL DATA
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MELTING POINT: N/A
INITIAL BOILING POINT: 171oF (of organic mixture)
VAPOR PRESSURE : 83 mm Hg (Est. for mixture, 20oC)
VAPOR DENSITY (Air=1): >1
SOLUBILITY IN WATER: Partly
SPECIFIC GRAVITY: >1
EVAPORATION RATE : 6.0 (Est. for mix, n-butyl acetate=1)
APPEARANCE/ ODOR: 
PHYSICAL STATE: Liquid
COLOR: Gray 
ODOR: Strong
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FIRE AND EXPLOSION DATA
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FLASH POINT (Most flammable solvent): 24oF 

AUTOIGNITION TEMPERATURE (Most flammable solvent): Unknown

FLAMMABLE LIMITS IN AIR LOWER: 1.8
(Most flammable solvent): UPPER 11.4

EXTINGUISHING MEDIA: Water fog, alcohol foam, dry chemical.

SPECIAL FIRE FIGHTING PROCEDURES: 

Cool exposed containers with water. When fighting use NIOSH approved
self-contained breathing apparatus with full facepiece operated
in positive pressure mode, as evolved fumes are toxic and cause
respiratory irritation.

UNUSUAL FIRE AND EXPLOSION HAZARDS: Store below flash point, away
from open flame or sparks.
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HEALTH HAZARDS OF COMPONENTS
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OSHA PERMISSIBLE EXPOSURE LIMIT: Not established for mixture.

COMPONENTS LISTED AS CARCINOGENIC BY NTP, IARC, or OSHA: None.
* * * EMS CATALOG NO: 12630 * * * (Page 3 of 4)

PRIMARY ROUTES OF ENTRY: 
ORGANIC COMPONENTS: Inhalation, skin absorption.
INORGANIC COMPONENTS: Ingestion.

ROUTE OF EXPOSURE: ACUTE & CHRONIC SYMPTOMS: MED CONDITIONS AGGRAV.

INHALATION  IRRITANT UNKNOWN 

EMERGENCY FIRST AID 
(for INHALATION): Remove to fresh air. If breathing is difficult,
give oxygen. If breathing stopped, start artificial respiration.

SKIN CONTACT IRRITANT UNKNOWN

EMERGENCY FIRST AID 
(for SKIN CONTACT): Remove contaminated clothing and launder before
reuse. Wash thoroughly with soap and water.

EYE CONTACT MODERATE UNKNOWN

EMERGENCY FIRST AID 
(for EYE CONTACT): Flush with running water for 15 minutes, lifting
upper and lower lids.

INGESTION IRRITATION OF THE GI SYSTEM UNKNOWN

EMERGENCY FIRST AID 
(for INGESTION): Drink large quantity of water.

Synergistic or additive effects of the above chemicals are unknown,
as are the effects of exposure to these chemicals in addition to others
present in the workplace.

In all cases, keep individuals warm and quiet and seek medical attention.
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REACTIVITY
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STABILITY: Stable.

INCOMPATIBILITY: Will not react with water. Avoid mixing with 
strong oxidizing agents, acids and caustics.

HAZARDOUS DECOMPOSITION 
PRODUCTS: Combustion produces carbon monoxide, carbon dioxide and
various hydrocarbons.
HAZARDOUS 
POLYMERIZATION: Will not occur.

CONDITIONS TO 
AVOID: Heat, open flames, sparks, ignition sources.
* * * EMS CATALOG NO: 12630 * * * (Page 4 of 4)
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PERSONAL PROTECTION AND CONTROLS
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PERSONAL PROTECTION: Avoid prolonged skin contact.

RESPIRATORY: 

Not required, if local exhaust is satisfactory. If overexposure
occurs, use NIOSH-OSHA approved air supply respirator suitable 
for organic vapors. Administrative or engineering controls should
be implemented to reduce exposure.

EYE: Chemical splash goggles or OSHA approved glasses.

SKIN: Solvent resistant gloves.

ENGINEERING CONTROLS:

Recommended ventilation, provide sufficient mechanical (general
or local exhaust) ventilation to maintain concentrations below
TLV.

HYGIENIC PRACTICES: 

Prevent eye contact with glasses or goggles, minimize skin contact,
use with adequate ventilation to minimize inhalation of vapor. 
Do not smoke or eat in work areas. Wash hands thoroughly prior
to smoking or eating.
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STORAGE/SPILL/DISPOSAL 
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STEPS TO BE TAKEN IN CASE MATERIAL IS RELEASED OR SPILLED:

Clean spill with disposable paper towels (wear rubber gloves) and
wash area with soap and water.

WASTE DISPOSABLE METHOD: 

Dispose of in accordance with all Local, State and Federal regulations.

SPECIAL STORAGE CONDITIONS:

Keep containers closed and sealed when not in use.