POTASSIUM DICHROMATE
MSDS Number: P5719 --- Effective Date: 11/02/99
1. Product Identification
Synonyms: Dichromic Acid, Dipotassium Salt; Potassium
Bichromate; Dipotassium Dichromate
CAS No.: 7778-50-9
Molecular Weight: 294.18
Chemical Formula: K2Cr2O7
Product Codes:
J.T. Baker: 3090, 3092, 3093, 3094
Mallinckrodt: 6758, 6770, 6772
2. Composition/Information on Ingredients
Ingredient CAS No Percent Hazardous
--------------------------------------- ------------ ------- ---------
Potassium Dichromate 7778-50-9 99 - 100% Yes
3. Hazards Identification
Emergency Overview
--------------------------
DANGER! STRONG OXIDIZER. CONTACT WITH OTHER MATERIAL MAY CAUSE A FIRE.
CORROSIVE. CAUSES SEVERE BURNS TO EVERY AREA OF CONTACT. HARMFUL IF SWALLOWED
OR INHALED. AFFECTS THE RESPIRATORY SYSTEM, LIVER, KIDNEYS, EYES, SKIN AND
BLOOD. MAY CAUSE ALLERGIC REACTION. CANCER HAZARD. CAN CAUSE CANCER. Risk of
cancer depends on duration and level of exposure.
J.T. Baker
SAF-T-DATA(tm) Ratings (Provided here for your convenience)
-----------------------------------------------------------------------------------------------------------
Health Rating: 4 - Extreme (Cancer Causing)
Flammability Rating: 0 -
None
Reactivity Rating: 3 - Severe (Oxidizer)
Contact Rating: 3 -
Severe (Life)
Lab Protective Equip: GOGGLES; LAB COAT; VENT HOOD; PROPER
GLOVES
Storage Color Code: Yellow (Reactive)
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Potential Health Effects
----------------------------------
Inhalation:
Corrosive. Extremely destructive to tissues of
the mucous membranes and upper respiratory tract. May cause ulceration and
perforation of the nasal septum. Symptoms may include sore throat, coughing,
shortness of breath, and labored breathing. May produce pulmonary
sensitization or allergic asthma. Higher exposures may cause pulmonary edema.
Ingestion:
Corrosive. Swallowing can cause severe burns of the
mouth, throat, and stomach, leading to death. Can cause sore throat, vomiting,
diarrhea. May cause violent gastroenteritis, peripheral vascular collapse,
dizziness, intense thirst, muscle cramps, shock, coma, abnormal bleeding,
fever, liver damage and acute renal failure.
Skin Contact:
Corrosive. Symptoms of redness, pain, and severe burn can occur. Dusts and
strong solutions may cause severe irritation. Contact with broken skin may
cause ulcers (chrome sores) and absorption, which may cause systemic
poisoning, affecting kidney and liver functions. May cause skin sensitization.
Eye Contact:
Corrosive. Contact can cause blurred vision,
redness, pain and severe tissue burns. May cause corneal injury or blindness.
Chronic Exposure:
Repeated or prolonged exposure can cause
ulceration and perforation of the nasal septum, respiratory irritation, liver
and kidney damage and ulceration of the skin. Ulcerations at first may be
painless, but may penetrate to the bone producing "chrome holes." Known to be
a human carcinogen.
Aggravation of Pre-existing Conditions:
Persons with pre-existing skin disorders, asthma, allergies or known
sensitization to chromic acid or chromates may be more susceptible to the
effects of this material.
4. First Aid Measures
Inhalation:
Remove to fresh air. If not breathing, give
artificial respiration. If breathing is difficult, give oxygen. Get medical
attention immediately.
Ingestion:
If swallowed, DO NOT INDUCE
VOMITING. Give large quantities of water. Never give anything by mouth to an
unconscious person. Get medical attention immediately.
Skin
Contact:
Immediately flush skin with plenty of water for at least 15
minutes while removing contaminated clothing and shoes. Get medical attention
immediately. Wash clothing before reuse. Thoroughly clean shoes before reuse.
Eye Contact:
Immediately flush eyes with plenty of water for at
least 15 minutes, lifting lower and upper eyelids occasionally. Get medical
attention immediately.
5. Fire Fighting Measures
Fire:
Not combustible, but substance is a strong
oxidizer and its heat of reaction with reducing agents or combustibles may
cause ignition. Releases oxygen, upon decomposition, which enhances
combustion.
Explosion:
Contact with oxidizable substances may
cause extremely violent combustion.
Fire Extinguishing Media:
Flood with large amounts of water. Water spray may be used to keep fire
exposed containers cool. Do not allow water runoff to enter sewers or
waterways.
Special Information:
In the event of a fire, wear
full protective clothing and NIOSH-approved self-contained breathing apparatus
with full facepiece operated in the pressure demand or other positive pressure
mode.
6. Accidental Release Measures
Ventilate area of leak or spill. Wear appropriate personal
protective equipment as specified in Section 8. Spills: Sweep up and
containerize for reclamation or disposal. Vacuuming or wet sweeping may be
used to avoid dust dispersal. US Regulations (CERCLA) require reporting spills
and releases to soil, water and air in excess of reportable quantities. The
toll free number for the US Coast Guard National Response Center is (800)
424-8802.
7. Handling and Storage
Protect against physical damage. Store in a dry location separate
from combustible, organic or other readily oxidizable materials. Avoid storage
on wood floors. Remove and dispose of any spilled dichromates; do not return
to original containers. Wear special protective equipment (Sec. 8) for
maintenance break-in or where exposures may exceed established exposure
levels. Wash hands, face, forearms and neck when exiting restricted areas.
Shower, dispose of outer clothing, change to clean garments at the end of the
day. Avoid cross-contamination of street clothes. Wash hands before eating and
do not eat, drink, or smoke in workplace. Containers of this material may be
hazardous when empty since they retain product residues (dust, solids);
observe all warnings and precautions listed for the product.
8. Exposure Controls/Personal Protection
Airborne Exposure Limits:
- OSHA Permissible Exposure
Limit (PEL):
For chromic acid and chromates, as CrO3 = 0.1 mg/m3
(ceiling)
- ACGIH Threshold Limit Value (TLV):
For water-soluble Cr(VI)
compounds, as Cr = 0.05 mg/m3 (TWA), A1 - confirmed human carcinogen.
Ventilation System:
A system of local and/or general exhaust is
recommended to keep employee exposures below the Airborne Exposure Limits.
Local exhaust ventilation is generally preferred because it can control the
emissions of the contaminant at its source, preventing dispersion of it into
the general work area. Please refer to the ACGIH document, Industrial
Ventilation, A Manual of Recommended Practices, most recent edition, for
details.
Personal Respirators (NIOSH Approved):
If the exposure
limit is exceeded, a half-face dust/mist respirator may be worn for up to ten
times the exposure limit or the maximum use concentration specified by the
appropriate regulatory agency or respirator supplier, whichever is lowest. A
full-face piece dust/mist respirator may be worn up to 50 times the exposure
limit, or the maximum use concentration specified by the appropriate
regulatory agency, or respirator supplier, whichever is lowest. For
emergencies or instances where the exposure levels are not known, use a
full-facepiece positive-pressure, air-supplied respirator. WARNING:
Air-purifying respirators do not protect workers in oxygen-deficient
atmospheres.
Skin Protection:
Wear impervious protective
clothing, including boots, gloves, lab coat, apron or coveralls, as
appropriate, to prevent skin contact.
Eye Protection:
Use
chemical safety goggles and/or full face shield where dusting or splashing of
solutions is possible. Maintain eye wash fountain and quick-drench facilities
in work area.
9. Physical and Chemical Properties
Appearance:
Orange-red crystals or powder
Odor:
Odorless.
Solubility:
6.5% @ 10C (50F) in
water.
Specific Gravity:
2.676 @ 25C/4C
pH:
4.04
(1% aq. solution) 3.57 (10% aq. solution)
% Volatiles by volume @ 21C
(70F):
0
Boiling Point:
500C (932F)
Melting
Point:
398C (748F)
Vapor Density (Air=1):
No
information found.
Vapor Pressure (mm Hg):
No information
found.
Evaporation Rate (BuAc=1):
No information found.
10. Stability and Reactivity
Stability:
Stable under ordinary conditions of use and
storage.
Hazardous Decomposition Products:
Burning may produce
chrome oxides.
Hazardous Polymerization:
Will not occur.
Incompatibilities:
Reducing agents, acetone plus sulfuric acid,
boron plus silicon, ethylene glycol, iron, hydrazine, and hydroxylamine. Any
combustible, organic or other readily oxidizable material (paper, wood,
sulfur, aluminum or plastics).
Conditions to Avoid:
Heat,
incompatibles.
11. Toxicological Information
Investigated as a tumorigen, mutagen, reproductive effector.
--------\Cancer Lists\------------------------------------------------------
---NTP Carcinogen---
Ingredient Known Anticipated IARC Category
------------------------------------ ----- ----------- -------------
Potassium Dichromate (7778-50-9) Yes No 1
12. Ecological Information
Environmental Fate:
When released into the soil, this
material may leach into groundwater. When released into water, this material
is not expected to evaporate significantly. This material may bioaccumulate to
some extent. When released into the air, this material may be removed from the
atmosphere to a moderate extent by wet deposition.
Environmental
Toxicity:
No information found.
13. Disposal Considerations
Whatever cannot be saved for recovery or recycling should be
handled as hazardous waste and sent to a RCRA approved waste facility.
Processing, use or contamination of this product may change the waste
management options. State and local disposal regulations may differ from
federal disposal regulations. Dispose of container and unused contents in
accordance with federal, state and local requirements.
14. Transport Information
Domestic (Land, D.O.T.)
-----------------------
Proper Shipping Name: RQ, OXIDIZING SOLID, CORROSIVE, N.O.S.
(POTASSIUM DICHROMATE)
Hazard Class: 5.1, 8
UN/NA:
UN3085
Packing Group: II
Information reported for product/size:
400LB
International (Water, I.M.O.)
-----------------------------
Proper Shipping Name: OXIDIZING
SOLID, CORROSIVE, N.O.S. (POTASSIUM DICHROMATE)
Hazard Class: 5.1,
8
UN/NA: UN3085
Packing Group: II
Information reported
for product/size: 400LB
15. Regulatory Information
--------\Chemical Inventory Status - Part 1\---------------------------------
Ingredient TSCA EC Japan Australia
----------------------------------------------- ---- --- ----- ---------
Potassium Dichromate (7778-50-9) Yes Yes Yes Yes
--------\Chemical Inventory Status - Part 2\---------------------------------
--Canada--
Ingredient Korea DSL NDSL Phil.
----------------------------------------------- ----- --- ---- -----
Potassium Dichromate (7778-50-9) Yes Yes No Yes
--------\Federal, State & International Regulations - Part 1\----------------
-SARA 302- ------SARA 313------
Ingredient RQ TPQ List Chemical Catg.
----------------------------------------- --- ----- ---- --------------
Potassium Dichromate (7778-50-9) No No No Chromium com
--------\Federal, State & International Regulations - Part 2\----------------
-RCRA- -TSCA-
Ingredient CERCLA 261.33 8(d)
----------------------------------------- ------ ------ ------
Potassium Dichromate (7778-50-9) 10 No No
Chemical Weapons Convention: No TSCA 12(b): Yes CDTA: Yes
SARA 311/312: Acute: Yes Chronic: Yes Fire: Yes Pressure: No
Reactivity: Yes (Pure / Solid)
WARNING:
THIS PRODUCT CONTAINS A CHEMICAL(S) KNOWN TO
THE STATE OF CALIFORNIA TO CAUSE CANCER.
Australian Hazchem
Code: 1WE
Poison Schedule: S6
WHMIS:
This MSDS
has been prepared according to the hazard criteria of the Controlled Products
Regulations (CPR) and the MSDS contains all of the information required by the
CPR.
16. Other Information
NFPA Ratings: Health: 3 Flammability: 1
Reactivity: 1 Other: Oxidizer
Label Hazard Warning:
DANGER! STRONG OXIDIZER. CONTACT WITH OTHER MATERIAL MAY CAUSE A FIRE.
CORROSIVE. CAUSES SEVERE BURNS TO EVERY AREA OF CONTACT. HARMFUL IF SWALLOWED
OR INHALED. AFFECTS THE RESPIRATORY SYSTEM, LIVER, KIDNEYS, EYES, SKIN AND
BLOOD. MAY CAUSE ALLERGIC REACTION. CANCER HAZARD. CAN CAUSE CANCER. Risk of
cancer depends on duration and level of exposure.
Label
Precautions:
Keep from contact with clothing and other combustible
materials.
Do not get in eyes, on skin, or on clothing.
Do not breathe
dust or mist from solutions.
Keep container closed.
Use only with
adequate ventilation.
Wash thoroughly after handling.
Store in a tightly
closed container.
Do not store near combustible materials.
Label
First Aid:
In case of contact, immediately flush eyes or skin with
plenty of water for at least 15 minutes while removing contaminated clothing
and shoes. Wash clothing before reuse. If inhaled, remove to fresh air. If not
breathing, give artificial respiration. If breathing is difficult, give
oxygen. If swallowed, DO NOT INDUCE VOMITING. Give large quantities of water.
Never give anything by mouth to an unconscious person. In all cases get
medical attention immediately.
Product Use:
Laboratory Reagent.
Revision Information:
MSDS Section(s) changed since last
revision of document include: 14.
Disclaimer:
************************************************************************************************
Mallinckrodt Baker, Inc. provides the information contained herein in
good faith but makes no representation as to its comprehensiveness or
accuracy. This document is intended only as a guide to the appropriate
precautionary handling of the material by a properly trained person using this
product. Individuals receiving the information must exercise their independent
judgment in determining its appropriateness for a particular purpose.
MALLINCKRODT BAKER, INC. MAKES NO REPRESENTATIONS OR WARRANTIES, EITHER
EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE WITH RESPECT TO THE
INFORMATION SET FORTH HEREIN OR THE PRODUCT TO WHICH THE INFORMATION REFERS.
ACCORDINGLY, MALLINCKRODT BAKER, INC. WILL NOT BE RESPONSIBLE FOR DAMAGES
RESULTING FROM USE OF OR RELIANCE UPON THIS INFORMATION.
************************************************************************************************
Prepared by: Strategic Services Division
Phone Number: (314)
539-1600 (U.S.A.)