MAP as a nutrient supplement

[Tōtōchtin]

I am curious why I have never seen MAP mentioned for a nutrient boost. There is a slight difference of N percentage so that can't be the reason. It would seem that most of us have alkaline water which would make me lean towards using MAP.
Tōtō

[Sporacle]

Here's a thread
viewtopic.php?t=80564

[Tōtōchtin]

I searched for MAP and Map as a nutrient. I had 73 hits,not one of them had the word MAP. That thread has no information about map as a yeast nutrient. MAP is not a fire extinguisher material. That fire extinguisher might of had MAP in it's formula. MAP's N source is the same as DAP N-NH4. Dap is mainly sourced from sulfur is I remember right. Haifas map is buffered to hang around the high 5's pH which would seem better for a fermentation.
Tōtō

[still_stirrin]

Mono-ammonium phosphate (MAP) has more phosphorous available but less nitrogen than di ammonium phosphate (DAP). But, MAP will store better at higher relative humidity than DAP. DAP is more water soluble than MAP, but both will dissolve relatively easily. One thing to consider is that MAP will result in an acidic solution, while DAP will result in a slightly basic solution.

Here’s a good read addressing both for use as fertilizers:

35 MAP and DAP Fact Sheet.pdf

MAP & DAP Facts

(137 KiB) Downloaded 59 times

Bottomline, either would be acceptable as a yeast nutrient provided you address the pH concerns.
ss

[Sporacle]

My apologies Toto, the very first post in that thread asked about it as a yeast nutrient. I assumed that the rest of the thread followed.

[Dougmatt]

Mono-ammonium phosphate (MAP) has more phosphorous available but less nitrogen than di ammonium phosphate (DAP). But, MAP will store better at higher relative humidity than DAP. DAP is more water soluble than MAP, but both will dissolve relatively easily. One thing to consider is that MAP will result in an acidic solution, while DAP will result in a slightly basic solution.

Here’s a good read addressing both for use as fertilizers:

35 MAP and DAP Fact Sheet.pdf


Bottomline, either would be acceptable as a yeast nutrient provided you address the pH concerns.
ss

Excellent synopsis ss. Thank you for this. Basically my read is, DAP is more commonly marketed and a better fit for general purpose fermentation due to its influence away from an acidic pH crash. A lot of fermentation issues result from low ph.

[NZChris]

If you use acronyms, expect less useful answers. I use MAP for building stills.

[Yummyrum]

If you use acronyms, expect less useful answers. I use MAP for building stills.

I use MAPP for that . One for the google enthusiasts to have fun with

But , yeah , I can understand the confusion.
Having worked with chemicals , the prefix’s Mono , Di and tri are normal . But to someone that is not familiar , figuring out MAP was mono ammonium phosphate
might not have been so obvious .

Add to that , chemical naming systems change and Di-ammonium phosphate can be called ammonium phosphate di-basic ….. and …. Mono Ammonium Phosphate can be called Ammonium Phosohate Mono-basic

LOL ….. so we all deserve a break in this one .

Having said all that , thanks SS .

I had lots of Ammonium Phosphate mono-basic at my last place . If I’d known , I would have given it a crack

[Saltbush Bill]

MAP means the same to me......gas for building.

[Tōtōchtin]

Mono-ammonium phosphate (MAP) has more phosphorous available but less nitrogen than di ammonium phosphate (DAP). But, MAP will store better at higher relative humidity than DAP. DAP is more water soluble than MAP, but both will dissolve relatively easily. One thing to consider is that MAP will result in an acidic solution, while DAP will result in a slightly basic solution.

Here’s a good read addressing both for use as fertilizers:

35 MAP and DAP Fact Sheet.pdf


Bottomline, either would be acceptable as a yeast nutrient provided you address the pH concerns.
ss

Excellent synopsis ss. Thank you for this. Basically my read is, DAP is more commonly marketed and a better fit for general purpose fermentation due to its influence away from an acidic pH crash. A lot of fermentation issues result from low ph.

Actually I think most have to drop their pH of their fermentations at the beginning so MAP would be better. You use so little that in reality it's not going to change the pH in a wash much.
Not all fertilizers are the same, but I have used Haifas products in 100k's of gallons making up nutients. They have no heavy metals,don't clump up,and dissolves very quickly, and are buffered well.
Tōtō

[bunny]

I am curious why I have never seen MAP mentioned for a nutrient boost. There is a slight difference of N percentage so that can't be the reason. It would seem that most of us have alkaline water which would make me lean towards using MAP.
Tōtō

I watched a video of two guys who claimed be manufacturers and sellers of both DAP and MAP.
Presumably the differences in their products were their DAP has twice as much ammonium and is instantly water soluble. Their MAP was made into little time released balls for slow application and solubility of the ammonium.

[Tōtōchtin]

Hola,
That brand of MAP sounds like it was meant to be used side dressing your crop. I always bought fert. as greenhouse grade mainly designed to be used in a hydroponic style. They dissolve right away,no sodium or heavy metals.
Tōtō