POTASSIUM DICHROMATE
MSDS Number: P5719 --- Effective Date: 12/08/96
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)
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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)
Prop 65:
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:
Pure. New 16 section MSDS format, all sections have been revised.
Disclaimer:
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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.
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Prepared by: Strategic Services Division
Phone Number: (314) 539-1600 (U.S.A.)