I used to say Pyrodex and 777 were ok if sufficient cleaning was done.
I have changed my mind about 777 , and updated the sticky on the Powder room:
update:
hogden changed their site structure, the old links are no longer valid, and they have made it increasingly more difficult
to find the SDS sheets -
here is a new link for pyrodex
https://www.hodgdon.com/wp-content/uploads/2018/08/2018-pyrodex-sds-new.pdfand triple 7
2017:
https://www.hodgdon.com/wp-content/uploads/2017/07/triple-seven-sds-sheet-2017.pdfsnip---------------------------------------------------------------------------------------
Section 3: Composition/information on ingregients
Component CAS-Number Weight %
Charcoal 16291-96-6 10%
Sodium Benzoate 532-32-1 10%
Potassium Nitrate 7757-79-1 30%
Potassium Perchlorate 7778-74-7 30%
Dicyaniamide 461-58-5 10%
Dextrin 9004-53-9 10%
Note: Other ingredients are trade secrets, but can be disclosed per 29CFR1910.1200(i)
Section 4: First-aid measures
Ingestion:
* if vomiting occurs, turn patient on side to maintain open airway. Do not induce vomiting.
contact a Poison control center for advice on treatment, if unsure.
Eye Contact:
* flush eye with water for at least 15 minutes.
Section 5: Fire-fighting measures
Extinguishing media:
* For unattended fire prevention, water can be used to disburse burning Triple Seven®. Triple Seven® has
its own oxygen supply; flame smothering techniques are ineffective. Water may be used on unburnt Triple
Seven® to retard further spread of fire.
Special Procedures:
* Triple Seven® is extremely flammable and may deflagrate. Get away and evacuate the area.
Unusual Hazards:
* As with any pyrotechnic, if under confinement or piled in moderate quantities, Triple Seven® can explode.
Toxic fumes, such as sulfur dioxide are emitted while burning.
Inhalation;
* remove patient from area to fresh air.
Skin Contact:
* wash the affected area with copius amounts of water. Some persons may be sensitive to p
endsnip---------------------------------------------------------------------------------------
Aug 2018:
https://www.hodgdon.com/wp-content/uploads/2018/08/2018-pyrodex-sds-new.pdfhttps://www.hodgdon.com/wp-content/uploads/2018/08/2018-tripleseven-sds-new.pdf-------
notice that in 2018 they changed the list to be deliberately vague -
ie: both potassium nitrate and potassium perchlorate are listed as *15-40% ...
*In accordance with paragraph (i) of the OSHA Hazard Communication Standard (29 CFR 1910.1200) ,
the specific chemical identity or exact wieght % has been withheld as a trade secret.
--------
Worse, they have deliberately left out Dextrin and Dicyaniamide in the latest triple 7 SDS "as a trade secret".
I call bull. they don't really have that many competitors, and the "full disclosure" has been published since before year 2000.
the 10% Dicyaniamide is an important ommission.
I myself am wondering what it does when burned.
I did my best with reading the chemistry tomes on
- Dicyaniamide
- Dicyandiamide
- Cyanoguanidine
- guanidine
- calcium cyanamide
and more
and came away more confused. Now I remember why I nearly failed chemistry
I am both intrigued and dismayed at the level of obfuscation.
Makes one wonder what they are trying to hide, and why.